21112323222 has 16 divisors (see below), whose sum is σ = 44708449392. Its totient is φ = 6623473920.

The previous prime is 21112323217. The next prime is 21112323227. The reversal of 21112323222 is 22232321112.

It is an interprime number because it is at equal distance from previous prime (21112323217) and next prime (21112323227).

It is a super-2 number, since 2×21112323222² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112323227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103491679 + ... + 103491882.

It is an arithmetic number, because the mean of its divisors is an integer number (2794278087).

Almost surely, 2^21112323222 is an apocalyptic number.

21112323222 is an abundant number, since it is smaller than the sum of its proper divisors (23596126170).

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

21112323222 is a wasteful number, since it uses less digits than its factorization.

21112323222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206983583.

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

Adding to 21112323222 its reverse (22232321112), we get a palindrome (43344644334).

The spelling of 21112323222 in words is "twenty-one billion, one hundred twelve million, three hundred twenty-three thousand, two hundred twenty-two".