121442042331 has 24 divisors (see below), whose sum is σ = 183190020000. Its totient is φ = 77379134976.

The previous prime is 121442042297. The next prime is 121442042383. The reversal of 121442042331 is 133240244121.

121442042331 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 420 + 4 + 233 + 1 = 666.

It is not a de Polignac number, because 121442042331 - 2¹⁰ = 121442041307 is a prime.

It is a super-2 number, since 2×121442042331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121442042295 and 121442042304.

It is not an unprimeable number, because it can be changed into a prime (121442242331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23685 + ... + 493401.

It is an arithmetic number, because the mean of its divisors is an integer number (7632917500).

Almost surely, 2^121442042331 is an apocalyptic number.

121442042331 is a deficient number, since it is larger than the sum of its proper divisors (61747977669).

121442042331 is a wasteful number, since it uses less digits than its factorization.

121442042331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470995 (or 470992 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 121442042331 its reverse (133240244121), we get a palindrome (254682286452).

The spelling of 121442042331 in words is "one hundred twenty-one billion, four hundred forty-two million, forty-two thousand, three hundred thirty-one".