31103131101123 has 16 divisors (see below), whose sum is σ = 41537618877600. Its totient is φ = 20702043701760.

The previous prime is 31103131101109. The next prime is 31103131101191. The reversal of 31103131101123 is 32110113130113.

It is not a de Polignac number, because 31103131101123 - 2²⁵ = 31103097546691 is a prime.

It is a super-2 number, since 2×31103131101123² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31103131101123.

It is not an unprimeable number, because it can be changed into a prime (31103131102123) 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, 9223483 + ... + 12135851.

It is an arithmetic number, because the mean of its divisors is an integer number (2596101179850).

Almost surely, 2^{31103131101123} is an apocalyptic number.

31103131101123 is a deficient number, since it is larger than the sum of its proper divisors (10434487776477).

31103131101123 is a wasteful number, since it uses less digits than its factorization.

31103131101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918102.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 31103131101123 its reverse (32110113130113), we get a palindrome (63213244231236).

The spelling of 31103131101123 in words is "thirty-one trillion, one hundred three billion, one hundred thirty-one million, one hundred one thousand, one hundred twenty-three".