21122200222122 has 16 divisors (see below), whose sum is σ = 43226828362080. Its totient is φ = 6876995421072.

The previous prime is 21122200222091. The next prime is 21122200222213. The reversal of 21122200222122 is 22122200222112.

It is a super-2 number, since 2×21122200222122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40934496297 + ... + 40934496812.

It is an arithmetic number, because the mean of its divisors is an integer number (2701676772630).

Almost surely, 2^{21122200222122} is an apocalyptic number.

21122200222122 is an abundant number, since it is smaller than the sum of its proper divisors (22104628139958).

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

21122200222122 is a wasteful number, since it uses less digits than its factorization.

21122200222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81868993157.

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

Adding to 21122200222122 its reverse (22122200222112), we get a palindrome (43244400444234).

The spelling of 21122200222122 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred million, two hundred twenty-two thousand, one hundred twenty-two".