21312032211222 has 8 divisors (see below), whose sum is σ = 42624064422456. Its totient is φ = 7104010737072.

The previous prime is 21312032211203. The next prime is 21312032211227. The reversal of 21312032211222 is 22211223021312.

It is a sphenic number, since it is the product of 3 distinct primes.

21312032211222 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21312032211192 and 21312032211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312032211227) 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, 1776002684263 + ... + 1776002684274.

It is an arithmetic number, because the mean of its divisors is an integer number (5328008052807).

Almost surely, 2^{21312032211222} is an apocalyptic number.

21312032211222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21312032211222 is a wasteful number, since it uses less digits than its factorization.

21312032211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552005368542.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21312032211222 its reverse (22211223021312), we get a palindrome (43523255232534).

The spelling of 21312032211222 in words is "twenty-one trillion, three hundred twelve billion, thirty-two million, two hundred eleven thousand, two hundred twenty-two".