21222213130231 has 8 divisors (see below), whose sum is σ = 21428348497920. Its totient is φ = 21016079579352.

The previous prime is 21222213130193. The next prime is 21222213130253. The reversal of 21222213130231 is 13203131222212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222213130231 - 2¹¹ = 21222213128183 is a prime.

It is a super-2 number, since 2×21222213130231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222213130196 and 21222213130205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222213130831) 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, 45042690 + ... + 45511408.

It is an arithmetic number, because the mean of its divisors is an integer number (2678543562240).

Almost surely, 2^{21222213130231} is an apocalyptic number.

21222213130231 is a deficient number, since it is larger than the sum of its proper divisors (206135367689).

21222213130231 is a wasteful number, since it uses less digits than its factorization.

21222213130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908405.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21222213130231 its reverse (13203131222212), we get a palindrome (34425344352443).

The spelling of 21222213130231 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirteen million, one hundred thirty thousand, two hundred thirty-one".