21100220212022 has 16 divisors (see below), whose sum is σ = 36295259347872. Its totient is φ = 9012088201920.

The previous prime is 21100220211911. The next prime is 21100220212111. The reversal of 21100220212022 is 22021202200112.

It is a happy number.

It is a congruent number.

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, 2571938879 + ... + 2571947082.

It is an arithmetic number, because the mean of its divisors is an integer number (2268453709242).

Almost surely, 2^{21100220212022} is an apocalyptic number.

21100220212022 is a deficient number, since it is larger than the sum of its proper divisors (15195039135850).

21100220212022 is a wasteful number, since it uses less digits than its factorization.

21100220212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143886263.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21100220212022 its reverse (22021202200112), we get a palindrome (43121422412134).

The spelling of 21100220212022 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred twelve thousand, twenty-two".