31112221213133 has 16 divisors (see below), whose sum is σ = 33115209462720. Its totient is φ = 29146295287296.

The previous prime is 31112221213127. The next prime is 31112221213141. The reversal of 31112221213133 is 33131212221113.

It is a cyclic number.

It is not a de Polignac number, because 31112221213133 - 2²⁸ = 31111952777677 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 (31112221212133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4923266 + ... + 9298547.

It is an arithmetic number, because the mean of its divisors is an integer number (2069700591420).

Almost surely, 2^{31112221213133} is an apocalyptic number.

It is an amenable number.

31112221213133 is a deficient number, since it is larger than the sum of its proper divisors (2002988249587).

31112221213133 is a wasteful number, since it uses less digits than its factorization.

31112221213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14223116.

The product of its digits is 1296, while the sum is 26.

Adding to 31112221213133 its reverse (33131212221113), we get a palindrome (64243433434246).

The spelling of 31112221213133 in words is "thirty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred thirty-three".