21122202220002 has 80 divisors (see below), whose sum is σ = 50971127682552. Its totient is φ = 6499008172800.

The previous prime is 21122202219967. The next prime is 21122202220037. The reversal of 21122202220002 is 20002220222112.

It is an interprime number because it is at equal distance from previous prime (21122202219967) and next prime (21122202220037).

It can be written as a sum of positive squares in 4 ways, for example, as 9494095400001 + 11628106820001 = 3081249^2 + 3410001^2 .

It is a super-2 number, since 2×21122202220002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 184253502 + ... + 184368102.

Almost surely, 2^{21122202220002} is an apocalyptic number.

21122202220002 is an abundant number, since it is smaller than the sum of its proper divisors (29848925462550).

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

21122202220002 is a wasteful number, since it uses less digits than its factorization.

21122202220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202145 (or 202136 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21122202220002 its reverse (20002220222112), we get a palindrome (41124422442114).

The spelling of 21122202220002 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred two million, two hundred twenty thousand, two".