31045105012213 has 4 divisors (see below), whose sum is σ = 31154805030208. Its totient is φ = 30935404994220.

The previous prime is 31045105012153. The next prime is 31045105012219. The reversal of 31045105012213 is 31221050154013.

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 31045105012213 - 2²⁵ = 31045071457781 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 (31045105012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54850008573 + ... + 54850009138.

It is an arithmetic number, because the mean of its divisors is an integer number (7788701257552).

Almost surely, 2^{31045105012213} is an apocalyptic number.

It is an amenable number.

31045105012213 is a deficient number, since it is larger than the sum of its proper divisors (109700017995).

31045105012213 is a wasteful number, since it uses less digits than its factorization.

31045105012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109700017994.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 31045105012213 its reverse (31221050154013), we get a palindrome (62266155166226).

The spelling of 31045105012213 in words is "thirty-one trillion, forty-five billion, one hundred five million, twelve thousand, two hundred thirteen".