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102012011021 = 2315661283207
BaseRepresentation
bin101111100000001100…
…0111100001000001101
3100202022101121002111102
41133000120330020031
53132410033323041
6114510315232445
710240644533564
oct1370030741015
9322271532442
10102012011021
113a299136828
121792b748725
139809600acb
144d1a364bdb
1529c0bc109b
hex17c063c20d

102012011021 has 8 divisors (see below), whose sum is σ = 106454488704. Its totient is φ = 97570131120.

The previous prime is 102012010927. The next prime is 102012011039. The reversal of 102012011021 is 120110210201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-102012011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012010993 and 102012011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012011221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218600 + ... + 501806.

It is an arithmetic number, because the mean of its divisors is an integer number (13306811088).

Almost surely, 2102012011021 is an apocalyptic number.

It is an amenable number.

102012011021 is a deficient number, since it is larger than the sum of its proper divisors (4442477683).

102012011021 is a wasteful number, since it uses less digits than its factorization.

102012011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298891.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102012011021 its reverse (120110210201), we get a palindrome (222122221222).

The spelling of 102012011021 in words is "one hundred two billion, twelve million, eleven thousand, twenty-one".

Divisors: 1 23 15661 283207 360203 6513761 4435304827 102012011021