31212103131233 has 4 divisors (see below), whose sum is σ = 31214601911088. Its totient is φ = 31209604351380.

The previous prime is 31212103131211. The next prime is 31212103131257. The reversal of 31212103131233 is 33213130121213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31212103131233 - 2⁶ = 31212103131169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212108131233) 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, 1249371191 + ... + 1249396172.

It is an arithmetic number, because the mean of its divisors is an integer number (7803650477772).

Almost surely, 2^{31212103131233} is an apocalyptic number.

It is an amenable number.

31212103131233 is a deficient number, since it is larger than the sum of its proper divisors (2498779855).

31212103131233 is a wasteful number, since it uses less digits than its factorization.

31212103131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498779854.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31212103131233 its reverse (33213130121213), we get a palindrome (64425233252446).

The spelling of 31212103131233 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-one thousand, two hundred thirty-three".