22221222011021 has 32 divisors (see below), whose sum is σ = 24489815306880. Its totient is φ = 20161350126720.

The previous prime is 22221222011011. The next prime is 22221222011047. The reversal of 22221222011021 is 12011022212222.

It is a de Polignac number, because none of the positive numbers 2^k-22221222011021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221222010984 and 22221222011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221222011011) 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, 3143471075 + ... + 3143478143.

It is an arithmetic number, because the mean of its divisors is an integer number (765306728340).

Almost surely, 2^{22221222011021} is an apocalyptic number.

It is an amenable number.

22221222011021 is a deficient number, since it is larger than the sum of its proper divisors (2268593295859).

22221222011021 is an equidigital number, since it uses as much as digits as its factorization.

22221222011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11418 (or 11396 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22221222011021 its reverse (12011022212222), we get a palindrome (34232244223243).

The spelling of 22221222011021 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, eleven thousand, twenty-one".