22111121231 has 16 divisors (see below), whose sum is σ = 23218618368. Its totient is φ = 21016195200.

The previous prime is 22111121171. The next prime is 22111121239. The reversal of 22111121231 is 13212111122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22111121231 - 2⁶ = 22111121167 is a prime.

It is a super-2 number, since 2×22111121231² (a number of 21 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 (22111121239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2695346 + ... + 2703536.

It is an arithmetic number, because the mean of its divisors is an integer number (1451163648).

Almost surely, 2^22111121231 is an apocalyptic number.

22111121231 is a deficient number, since it is larger than the sum of its proper divisors (1107497137).

22111121231 is a wasteful number, since it uses less digits than its factorization.

22111121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8942.

The product of its digits is 48, while the sum is 17.

Adding to 22111121231 its reverse (13212111122), we get a palindrome (35323232353).

The spelling of 22111121231 in words is "twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirty-one".