121420232154 has 48 divisors (see below), whose sum is σ = 283451025312. Its totient is φ = 37341985824.

The previous prime is 121420232137. The next prime is 121420232161. The reversal of 121420232154 is 451232024121.

121420232154 is a `hidden beast` number, since 1 + 2 + 1 + 420 + 23 + 215 + 4 = 666.

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, 362869 + ... + 611975.

It is an arithmetic number, because the mean of its divisors is an integer number (5905229694).

Almost surely, 2^121420232154 is an apocalyptic number.

121420232154 is an abundant number, since it is smaller than the sum of its proper divisors (162030793158).

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

121420232154 is a wasteful number, since it uses less digits than its factorization.

121420232154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251211 (or 251208 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 121420232154 its reverse (451232024121), we get a palindrome (572652256275).

The spelling of 121420232154 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred thirty-two thousand, one hundred fifty-four".