21312211111122 has 64 divisors (see below), whose sum is σ = 47669437987200. Its totient is φ = 6322472755200.

The previous prime is 21312211111033. The next prime is 21312211111123. The reversal of 21312211111122 is 22111111221312.

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

It is not an unprimeable number, because it can be changed into a prime (21312211111123) 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, 86992879 + ... + 87237522.

It is an arithmetic number, because the mean of its divisors is an integer number (744834968550).

Almost surely, 2^{21312211111122} is an apocalyptic number.

21312211111122 is an abundant number, since it is smaller than the sum of its proper divisors (26357226876078).

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

21312211111122 is a wasteful number, since it uses less digits than its factorization.

21312211111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174230491.

The product of its digits is 96, while the sum is 21.

Adding to 21312211111122 its reverse (22111111221312), we get a palindrome (43423322332434).

The spelling of 21312211111122 in words is "twenty-one trillion, three hundred twelve billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty-two".