121155231124 has 24 divisors (see below), whose sum is σ = 213505849088. Its totient is φ = 60153861600.

The previous prime is 121155231103. The next prime is 121155231137. The reversal of 121155231124 is 421132551121.

It is a junction number, because it is equal to n+sod(n) for n = 121155231092 and 121155231101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1635022 + ... + 1707514.

Almost surely, 2^121155231124 is an apocalyptic number.

It is an amenable number.

121155231124 is a deficient number, since it is larger than the sum of its proper divisors (92350617964).

121155231124 is a wasteful number, since it uses less digits than its factorization.

121155231124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75415 (or 75413 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

Adding to 121155231124 its reverse (421132551121), we get a palindrome (542287782245).

It can be divided in two parts, 1211552 and 31124, that added together give a triangular number (1242676 = T₁₅₇₆).

The spelling of 121155231124 in words is "one hundred twenty-one billion, one hundred fifty-five million, two hundred thirty-one thousand, one hundred twenty-four".