121531439430834 has 48 divisors (see below), whose sum is σ = 249511996633536. Its totient is φ = 39459514841280.

The previous prime is 121531439430811. The next prime is 121531439430857. The reversal of 121531439430834 is 438034934135121.

It is an interprime number because it is at equal distance from previous prime (121531439430811) and next prime (121531439430857).

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, 24125149 + ... + 28724304.

It is an arithmetic number, because the mean of its divisors is an integer number (5198166596532).

Almost surely, 2^{121531439430834} is an apocalyptic number.

121531439430834 is an abundant number, since it is smaller than the sum of its proper divisors (127980557202702).

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

121531439430834 is a wasteful number, since it uses less digits than its factorization.

121531439430834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52849683 (or 52849622 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 121531439430834 in words is "one hundred twenty-one trillion, five hundred thirty-one billion, four hundred thirty-nine million, four hundred thirty thousand, eight hundred thirty-four".