102121010021220 has 96 divisors (see below), whose sum is σ = 292647952816128. Its totient is φ = 26595786506112.

The previous prime is 102121010021209. The next prime is 102121010021243. The reversal of 102121010021220 is 22120010121201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102121010021220.

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, 37455142 + ... + 40089021.

It is an arithmetic number, because the mean of its divisors is an integer number (3048416175168).

Almost surely, 2^{102121010021220} is an apocalyptic number.

102121010021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121010021220 is an abundant number, since it is smaller than the sum of its proper divisors (190526942794908).

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

102121010021220 is a wasteful number, since it uses less digits than its factorization.

102121010021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77544689 (or 77544687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102121010021220 its reverse (22120010121201), we get a palindrome (124241020142421).

The spelling of 102121010021220 in words is "one hundred two trillion, one hundred twenty-one billion, ten million, twenty-one thousand, two hundred twenty".