31133122222031 has 4 divisors (see below), whose sum is σ = 31133251069272. Its totient is φ = 31132993374792.

The previous prime is 31133122221991. The next prime is 31133122222049. The reversal of 31133122222031 is 13022222133113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31133122222031 - 2³⁰ = 31132048480207 is a prime.

It is a super-2 number, since 2×31133122222031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133122221031) 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, 64060496 + ... + 64544661.

It is an arithmetic number, because the mean of its divisors is an integer number (7783312767318).

Almost surely, 2^{31133122222031} is an apocalyptic number.

31133122222031 is a deficient number, since it is larger than the sum of its proper divisors (128847241).

31133122222031 is a wasteful number, since it uses less digits than its factorization.

31133122222031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128847240.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31133122222031 its reverse (13022222133113), we get a palindrome (44155344355144).

The spelling of 31133122222031 in words is "thirty-one trillion, one hundred thirty-three billion, one hundred twenty-two million, two hundred twenty-two thousand, thirty-one".