21222212210022 has 32 divisors (see below), whose sum is σ = 42727531924224. Its totient is φ = 7026890580000.

The previous prime is 21222212209997. The next prime is 21222212210053. The reversal of 21222212210022 is 22001221222212.

It is a super-2 number, since 2×21222212210022² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19015272 + ... + 20100372.

It is an arithmetic number, because the mean of its divisors is an integer number (1335235372632).

Almost surely, 2^{21222212210022} is an apocalyptic number.

21222212210022 is an abundant number, since it is smaller than the sum of its proper divisors (21505319714202).

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

21222212210022 is a wasteful number, since it uses less digits than its factorization.

21222212210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106844.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21222212210022 its reverse (22001221222212), we get a palindrome (43223433432234).

The spelling of 21222212210022 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred ten thousand, twenty-two".