121431150531 has 12 divisors (see below), whose sum is σ = 176680848552. Its totient is φ = 80363193696.

The previous prime is 121431150521. The next prime is 121431150551. The reversal of 121431150531 is 135051134121.

121431150531 is a `hidden beast` number, since 1 + 2 + 14 + 3 + 115 + 0 + 531 = 666.

It is not a de Polignac number, because 121431150531 - 2¹⁹ = 121430626243 is a prime.

It is a super-2 number, since 2×121431150531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121431150495 and 121431150504.

It is not an unprimeable number, because it can be changed into a prime (121431150521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49240921 + ... + 49243386.

It is an arithmetic number, because the mean of its divisors is an integer number (14723404046).

Almost surely, 2^121431150531 is an apocalyptic number.

121431150531 is a deficient number, since it is larger than the sum of its proper divisors (55249698021).

121431150531 is a wasteful number, since it uses less digits than its factorization.

121431150531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98484450 (or 98484447 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 121431150531 its reverse (135051134121), we get a palindrome (256482284652).

The spelling of 121431150531 in words is "one hundred twenty-one billion, four hundred thirty-one million, one hundred fifty thousand, five hundred thirty-one".