131121154234520 has 32 divisors (see below), whose sum is σ = 295038234032400. Its totient is φ = 52445681781888.

The previous prime is 131121154234513. The next prime is 131121154234627. The reversal of 131121154234520 is 25432451121131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86108054 + ... + 87617573.

Almost surely, 2^{131121154234520} is an apocalyptic number.

131121154234520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121154234520 is an abundant number, since it is smaller than the sum of its proper divisors (163917079797880).

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

131121154234520 is a wasteful number, since it uses less digits than its factorization.

131121154234520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173744507 (or 173744503 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 131121154234520 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred fifty-four million, two hundred thirty-four thousand, five hundred twenty".