22111111111031 has 4 divisors (see below), whose sum is σ = 22111202317512. Its totient is φ = 22111019904552.

The previous prime is 22111111111027. The next prime is 22111111111079. The reversal of 22111111111031 is 13011111111122.

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 22111111111031 - 2² = 22111111111027 is a prime.

It is a super-2 number, since 2×22111111111031² (a number of 27 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 (22111111111021) 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, 45238625 + ... + 45724778.

It is an arithmetic number, because the mean of its divisors is an integer number (5527800579378).

Almost surely, 2^{22111111111031} is an apocalyptic number.

22111111111031 is a deficient number, since it is larger than the sum of its proper divisors (91206481).

22111111111031 is an equidigital number, since it uses as much as digits as its factorization.

22111111111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91206480.

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 22111111111031 its reverse (13011111111122), we get a palindrome (35122222222153).

Subtracting from 22111111111031 its reverse (13011111111122), we obtain a palindrome (9099999999909).

The spelling of 22111111111031 in words is "twenty-two trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, thirty-one".