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1021103020 = 225734721019
BaseRepresentation
bin111100110111001…
…100101110101100
32122011101102000101
4330313030232230
54042400244040
6245153440444
734206142510
oct7467145654
92564342011
101021103020
114844278a3
12245b70124
13133718692
1499882140
155e99e09a
hex3cdccbac

1021103020 has 48 divisors (see below), whose sum is σ = 2457826560. Its totient is φ = 349066944.

The previous prime is 1021103003. The next prime is 1021103047. The reversal of 1021103020 is 203011201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1021102988 and 1021103006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38071 + ... + 59089.

It is an arithmetic number, because the mean of its divisors is an integer number (51204720).

Almost surely, 21021103020 is an apocalyptic number.

1021103020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021103020 is an abundant number, since it is smaller than the sum of its proper divisors (1436723540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021103020 is a wasteful number, since it uses less digits than its factorization.

1021103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21382 (or 21380 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1021103020 is about 31954.7026273129. The cubic root of 1021103020 is about 1006.9854301448.

Adding to 1021103020 its reverse (203011201), we get a palindrome (1224114221).

The spelling of 1021103020 in words is "one billion, twenty-one million, one hundred three thousand, twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 347 694 1388 1735 2429 3470 4858 6940 9716 12145 21019 24290 42038 48580 84076 105095 147133 210190 294266 420380 588532 735665 1471330 2942660 7293593 14587186 29174372 36467965 51055151 72935930 102110302 145871860 204220604 255275755 510551510 1021103020