31122122223 has 16 divisors (see below), whose sum is σ = 42246028800. Its totient is φ = 20373924480.

The previous prime is 31122122203. The next prime is 31122122233. The reversal of 31122122223 is 32222122113.

It is not a de Polignac number, because 31122122223 - 2⁸ = 31122121967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31122122223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122122203) 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 15 ways as a sum of consecutive naturals, for example, 64743 + ... + 257751.

It is an arithmetic number, because the mean of its divisors is an integer number (2640376800).

Almost surely, 2^31122122223 is an apocalyptic number.

31122122223 is a deficient number, since it is larger than the sum of its proper divisors (11123906577).

31122122223 is a wasteful number, since it uses less digits than its factorization.

31122122223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193982.

The product of its digits is 576, while the sum is 21.

Adding to 31122122223 its reverse (32222122113), we get a palindrome (63344244336).

The spelling of 31122122223 in words is "thirty-one billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-three".