1202101020 has 96 divisors (see below), whose sum is σ = 3767400000. Its totient is φ = 318200832.

The previous prime is 1202101007. The next prime is 1202101037. The reversal of 1202101020 is 201012021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1202100993 and 1202101011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65856 + ... + 82104.

It is an arithmetic number, because the mean of its divisors is an integer number (39243750).

Almost surely, 2^1202101020 is an apocalyptic number.

1202101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883700000).

1202101020 is an abundant number, since it is smaller than the sum of its proper divisors (2565298980).

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

1202101020 is a wasteful number, since it uses less digits than its factorization.

1202101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16404 (or 16396 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1202101020 is about 34671.3285006502. The cubic root of 1202101020 is about 1063.2783928358.

Adding to 1202101020 its reverse (201012021), we get a palindrome (1403113041).

The spelling of 1202101020 in words is "one billion, two hundred two million, one hundred one thousand, twenty".