121021021011120 has 160 divisors (see below), whose sum is σ = 379823144143872. Its totient is φ = 31873265980416.

The previous prime is 121021021011097. The next prime is 121021021011167. The reversal of 121021021011120 is 21110120120121.

It is a happy number.

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 121021021011120.

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, 2657997 + ... + 15783123.

Almost surely, 2^{121021021011120} is an apocalyptic number.

121021021011120 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 121021021011120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189911572071936).

121021021011120 is an abundant number, since it is smaller than the sum of its proper divisors (258802123132752).

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

121021021011120 is a wasteful number, since it uses less digits than its factorization.

121021021011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13125619 (or 13125613 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121021021011120 its reverse (21110120120121), we get a palindrome (142131141131241).

The spelling of 121021021011120 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, eleven thousand, one hundred twenty".