121136431 has 8 divisors (see below), whose sum is σ = 130541040. Its totient is φ = 111744192.

The previous prime is 121136399. The next prime is 121136453. The reversal of 121136431 is 134631121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121136431 - 2⁵ = 121136399 is a prime.

It is a super-2 number, since 2×121136431² = 29348069830835522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121136131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32460 + ... + 35998.

It is an arithmetic number, because the mean of its divisors is an integer number (16317630).

Almost surely, 2^121136431 is an apocalyptic number.

121136431 is a deficient number, since it is larger than the sum of its proper divisors (9404609).

121136431 is a wasteful number, since it uses less digits than its factorization.

121136431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185.

The product of its digits is 432, while the sum is 22.

The square root of 121136431 is about 11006.1996620087. The cubic root of 121136431 is about 494.7945697232.

Adding to 121136431 its reverse (134631121), we get a palindrome (255767552).

The spelling of 121136431 in words is "one hundred twenty-one million, one hundred thirty-six thousand, four hundred thirty-one".