31111223022 has 48 divisors (see below), whose sum is σ = 73548317232. Its totient is φ = 9426015360.

The previous prime is 31111222999. The next prime is 31111223069. The reversal of 31111223022 is 22032211113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31111222986 and 31111223004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1649268 + ... + 1668024.

It is an arithmetic number, because the mean of its divisors is an integer number (1532256609).

Almost surely, 2^31111223022 is an apocalyptic number.

31111223022 is an abundant number, since it is smaller than the sum of its proper divisors (42437094210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111223022 is a wasteful number, since it uses less digits than its factorization.

31111223022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27153 (or 27150 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31111223022 its reverse (22032211113), we get a palindrome (53143434135).

The spelling of 31111223022 in words is "thirty-one billion, one hundred eleven million, two hundred twenty-three thousand, twenty-two".