31231121120131 has 8 divisors (see below), whose sum is σ = 34008480349200. Its totient is φ = 28567123492320.

The previous prime is 31231121120123. The next prime is 31231121120149. The reversal of 31231121120131 is 13102112113213.

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 31231121120131 - 2³ = 31231121120123 is a prime.

It is a super-2 number, since 2×31231121120131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231121120161) 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, 28340399740 + ... + 28340400841.

It is an arithmetic number, because the mean of its divisors is an integer number (4251060043650).

Almost surely, 2^{31231121120131} is an apocalyptic number.

31231121120131 is a deficient number, since it is larger than the sum of its proper divisors (2777359229069).

31231121120131 is a wasteful number, since it uses less digits than its factorization.

31231121120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56680800629.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31231121120131 its reverse (13102112113213), we get a palindrome (44333233233344).

The spelling of 31231121120131 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred thirty-one".