21200122100022 has 64 divisors (see below), whose sum is σ = 43270700872896. Its totient is φ = 6922075596800.

The previous prime is 21200122100009. The next prime is 21200122100033. The reversal of 21200122100022 is 22000122100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200122099974 and 21200122100010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 493544098 + ... + 493587050.

It is an arithmetic number, because the mean of its divisors is an integer number (676104701139).

Almost surely, 2^{21200122100022} is an apocalyptic number.

21200122100022 is an abundant number, since it is smaller than the sum of its proper divisors (22070578772874).

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

21200122100022 is a wasteful number, since it uses less digits than its factorization.

21200122100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45505.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21200122100022 its reverse (22000122100212), we get a palindrome (43200244200234).

The spelling of 21200122100022 in words is "twenty-one trillion, two hundred billion, one hundred twenty-two million, one hundred thousand, twenty-two".