121232565144 has 48 divisors (see below), whose sum is σ = 328429530000. Its totient is φ = 40399614144.

The previous prime is 121232565133. The next prime is 121232565163. The reversal of 121232565144 is 441565232121.

121232565144 is a `hidden beast` number, since 1 + 21 + 2 + 32 + 565 + 1 + 44 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 121232565099 and 121232565108.

It is a congruent number.

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, 28482 + ... + 493230.

It is an arithmetic number, because the mean of its divisors is an integer number (6842281875).

Almost surely, 2^121232565144 is an apocalyptic number.

It is an amenable number.

121232565144 is an abundant number, since it is smaller than the sum of its proper divisors (207196964856).

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

121232565144 is a wasteful number, since it uses less digits than its factorization.

121232565144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468384 (or 468377 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 121232565144 its reverse (441565232121), we get a palindrome (562797797265).

The spelling of 121232565144 in words is "one hundred twenty-one billion, two hundred thirty-two million, five hundred sixty-five thousand, one hundred forty-four".