121542164424 has 48 divisors (see below), whose sum is σ = 329220824400. Its totient is φ = 40508623584.

The previous prime is 121542164417. The next prime is 121542164483. The reversal of 121542164424 is 424461245121.

121542164424 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 2 + 1 + 644 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446767 + ... + 665345.

It is an arithmetic number, because the mean of its divisors is an integer number (6858767175).

Almost surely, 2^121542164424 is an apocalyptic number.

It is an amenable number.

121542164424 is an abundant number, since it is smaller than the sum of its proper divisors (207678659976).

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

121542164424 is a wasteful number, since it uses less digits than its factorization.

121542164424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226314 (or 226307 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The spelling of 121542164424 in words is "one hundred twenty-one billion, five hundred forty-two million, one hundred sixty-four thousand, four hundred twenty-four".