121512330540 has 72 divisors (see below), whose sum is σ = 368689120800. Its totient is φ = 32394345984.

The previous prime is 121512330497. The next prime is 121512330581. The reversal of 121512330540 is 45033215121.

121512330540 is a `hidden beast` number, since 1 + 21 + 51 + 23 + 30 + 540 = 666.

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, 574161 + ... + 756759.

Almost surely, 2^121512330540 is an apocalyptic number.

121512330540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121512330540 is an abundant number, since it is smaller than the sum of its proper divisors (247176790260).

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

121512330540 is a wasteful number, since it uses less digits than its factorization.

121512330540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186311 (or 186306 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 121512330540 its reverse (45033215121), we get a palindrome (166545545661).

The spelling of 121512330540 in words is "one hundred twenty-one billion, five hundred twelve million, three hundred thirty thousand, five hundred forty".