102121021020120 has 128 divisors (see below), whose sum is σ = 320699908730880. Its totient is φ = 25982631360000.

The previous prime is 102121021020103. The next prime is 102121021020169. The reversal of 102121021020120 is 21020120121201.

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 102121021020120.

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, 193059031 + ... + 193587270.

It is an arithmetic number, because the mean of its divisors is an integer number (2505468036960).

Almost surely, 2^{102121021020120} is an apocalyptic number.

102121021020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121021020120 is an abundant number, since it is smaller than the sum of its proper divisors (218578887710760).

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

102121021020120 is a wasteful number, since it uses less digits than its factorization.

102121021020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386646417 (or 386646413 counting only the distinct ones).

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

Adding to 102121021020120 its reverse (21020120121201), we get a palindrome (123141141141321).

The spelling of 102121021020120 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-one million, twenty thousand, one hundred twenty".