121132431 has 24 divisors (see below), whose sum is σ = 201955104. Its totient is φ = 68529600.

The previous prime is 121132423. The next prime is 121132483. The reversal of 121132431 is 134231121.

It is not a de Polignac number, because 121132431 - 2³ = 121132423 is a prime.

It is a super-2 number, since 2×121132431² = 29346131679939522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132411) 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, 3156 + ... + 15881.

It is an arithmetic number, because the mean of its divisors is an integer number (8414796).

Almost surely, 2^121132431 is an apocalyptic number.

121132431 is a deficient number, since it is larger than the sum of its proper divisors (80822673).

121132431 is a wasteful number, since it uses less digits than its factorization.

121132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151 (or 19148 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121132431 is about 11006.0179447428. The cubic root of 121132431 is about 494.7891235222.

Adding to 121132431 its reverse (134231121), we get a palindrome (255363552).

The spelling of 121132431 in words is "one hundred twenty-one million, one hundred thirty-two thousand, four hundred thirty-one".