121313431 has 8 divisors (see below), whose sum is σ = 127248480. Its totient is φ = 115433472.

The previous prime is 121313419. The next prime is 121313441. The reversal of 121313431 is 134313121.

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 121313431 - 2⁷ = 121313303 is a prime.

It is a super-2 number, since 2×121313431² = 29433897081983522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121313399 and 121313408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313441) 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, 9226 + ... + 18103.

It is an arithmetic number, because the mean of its divisors is an integer number (15906060).

Almost surely, 2^121313431 is an apocalyptic number.

121313431 is a deficient number, since it is larger than the sum of its proper divisors (5935049).

121313431 is a wasteful number, since it uses less digits than its factorization.

121313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27545.

The product of its digits is 216, while the sum is 19.

The square root of 121313431 is about 11014.2376495153. The cubic root of 121313431 is about 495.0354441851.

Adding to 121313431 its reverse (134313121), we get a palindrome (255626552).

The spelling of 121313431 in words is "one hundred twenty-one million, three hundred thirteen thousand, four hundred thirty-one".