10202101020 has 72 divisors (see below), whose sum is σ = 31782782304. Its totient is φ = 2647029888.

The previous prime is 10202100991. The next prime is 10202101087. The reversal of 10202101020 is 2010120201.

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 = 10202100993 and 10202101011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 759264 + ... + 772583.

It is an arithmetic number, because the mean of its divisors is an integer number (441427532).

Almost surely, 2^10202101020 is an apocalyptic number.

10202101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10202101020 is an abundant number, since it is smaller than the sum of its proper divisors (21580681284).

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

10202101020 is a wasteful number, since it uses less digits than its factorization.

10202101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531899 (or 1531894 counting only the distinct ones).

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

Adding to 10202101020 its reverse (2010120201), we get a palindrome (12212221221).

The spelling of 10202101020 in words is "ten billion, two hundred two million, one hundred one thousand, twenty".