31213312103 has 8 divisors (see below), whose sum is σ = 32292913680. Its totient is φ = 30133929280.

The previous prime is 31213312063. The next prime is 31213312133. The reversal of 31213312103 is 30121331213.

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 31213312103 - 2⁸ = 31213311847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213312133) 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, 267968 + ... + 366378.

It is an arithmetic number, because the mean of its divisors is an integer number (4036614210).

Almost surely, 2^31213312103 is an apocalyptic number.

31213312103 is a deficient number, since it is larger than the sum of its proper divisors (1079601577).

31213312103 is a wasteful number, since it uses less digits than its factorization.

31213312103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109377.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31213312103 its reverse (30121331213), we get a palindrome (61334643316).

It can be divided in two parts, 3121331210 and 3, that added together give a palindrome (3121331213).

The spelling of 31213312103 in words is "thirty-one billion, two hundred thirteen million, three hundred twelve thousand, one hundred three".