31211203113123 has 32 divisors (see below), whose sum is σ = 45472984899840. Its totient is φ = 18884707645440.

The previous prime is 31211203113113. The next prime is 31211203113131. The reversal of 31211203113123 is 32131130211213.

It is not a de Polignac number, because 31211203113123 - 2¹⁶ = 31211203047587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31211203113093 and 31211203113102.

It is not an unprimeable number, because it can be changed into a prime (31211203113113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53451340 + ... + 54032102.

It is an arithmetic number, because the mean of its divisors is an integer number (1421030778120).

Almost surely, 2^{31211203113123} is an apocalyptic number.

31211203113123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31211203113123 is a deficient number, since it is larger than the sum of its proper divisors (14261781786717).

31211203113123 is a wasteful number, since it uses less digits than its factorization.

31211203113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583459.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31211203113123 its reverse (32131130211213), we get a palindrome (63342333324336).

The spelling of 31211203113123 in words is "thirty-one trillion, two hundred eleven billion, two hundred three million, one hundred thirteen thousand, one hundred twenty-three".