120940121538 has 48 divisors (see below), whose sum is σ = 268284752736. Its totient is φ = 39353247360.

The previous prime is 120940121509. The next prime is 120940121539. The reversal of 120940121538 is 835121049021.

120940121538 is a `hidden beast` number, since 1 + 2 + 0 + 9 + 401 + 215 + 38 = 666.

It is a super-2 number, since 2×120940121538² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120940121539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1331433 + ... + 1419363.

It is an arithmetic number, because the mean of its divisors is an integer number (5589265682).

Almost surely, 2^120940121538 is an apocalyptic number.

120940121538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

120940121538 is an abundant number, since it is smaller than the sum of its proper divisors (147344631198).

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

120940121538 is a wasteful number, since it uses less digits than its factorization.

120940121538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89759 (or 89756 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 120940121538 in words is "one hundred twenty billion, nine hundred forty million, one hundred twenty-one thousand, five hundred thirty-eight".