31203110111123 has 4 divisors (see below), whose sum is σ = 32845379064360. Its totient is φ = 29560841157888.

The previous prime is 31203110111113. The next prime is 31203110111149. The reversal of 31203110111123 is 32111101130213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31203110111123 - 2¹⁰ = 31203110110099 is a prime.

It is a super-2 number, since 2×31203110111123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31203110111095 and 31203110111104.

It is not an unprimeable number, because it can be changed into a prime (31203110111113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821134476590 + ... + 821134476627.

It is an arithmetic number, because the mean of its divisors is an integer number (8211344766090).

Almost surely, 2^{31203110111123} is an apocalyptic number.

31203110111123 is a deficient number, since it is larger than the sum of its proper divisors (1642268953237).

31203110111123 is a wasteful number, since it uses less digits than its factorization.

31203110111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642268953236.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31203110111123 its reverse (32111101130213), we get a palindrome (63314211241336).

The spelling of 31203110111123 in words is "thirty-one trillion, two hundred three billion, one hundred ten million, one hundred eleven thousand, one hundred twenty-three".