31223112022011 has 32 divisors (see below), whose sum is σ = 53934660451840. Its totient is φ = 15602526768384.

The previous prime is 31223112021971. The next prime is 31223112022043. The reversal of 31223112022011 is 11022021132213.

It is not a de Polignac number, because 31223112022011 - 2¹¹ = 31223112019963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31223112022061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3009741490 + ... + 3009751863.

It is an arithmetic number, because the mean of its divisors is an integer number (1685458139120).

Almost surely, 2^{31223112022011} is an apocalyptic number.

31223112022011 is a deficient number, since it is larger than the sum of its proper divisors (22711548429829).

31223112022011 is a wasteful number, since it uses less digits than its factorization.

31223112022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6019493395.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31223112022011 its reverse (11022021132213), we get a palindrome (42245133154224).

The spelling of 31223112022011 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred twelve million, twenty-two thousand, eleven".