21122200022002 has 16 divisors (see below), whose sum is σ = 32003883034200. Its totient is φ = 10454420286720.

The previous prime is 21122200021999. The next prime is 21122200022009. The reversal of 21122200022002 is 20022000222112.

It can be written as a sum of positive squares in 4 ways, for example, as 13315266682081 + 7806933339921 = 3649009^2 + 2794089^2 .

It is a super-2 number, since 2×21122200022002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122200022009) 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, 45085399 + ... + 45551482.

Almost surely, 2^{21122200022002} is an apocalyptic number.

21122200022002 is a deficient number, since it is larger than the sum of its proper divisors (10881683012198).

21122200022002 is a wasteful number, since it uses less digits than its factorization.

21122200022002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90638061.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21122200022002 its reverse (20022000222112), we get a palindrome (41144200244114).

The spelling of 21122200022002 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred million, twenty-two thousand, two".