31231120023403 has 16 divisors (see below), whose sum is σ = 33253977854880. Its totient is φ = 29228909031936.

The previous prime is 31231120023371. The next prime is 31231120023407. The reversal of 31231120023403 is 30432002113213.

It is a cyclic number.

It is not a de Polignac number, because 31231120023403 - 2⁵ = 31231120023371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231120023407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116099125 + ... + 116367817.

It is an arithmetic number, because the mean of its divisors is an integer number (2078373615930).

Almost surely, 2^{31231120023403} is an apocalyptic number.

31231120023403 is a deficient number, since it is larger than the sum of its proper divisors (2022857831477).

31231120023403 is a wasteful number, since it uses less digits than its factorization.

31231120023403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307086.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31231120023403 its reverse (30432002113213), we get a palindrome (61663122136616).

The spelling of 31231120023403 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty million, twenty-three thousand, four hundred three".