21002220220022 has 16 divisors (see below), whose sum is σ = 31679740658160. Its totient is φ = 10442308201248.

The previous prime is 21002220219979. The next prime is 21002220220049. The reversal of 21002220220022 is 22002202220012.

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, 30518228 + ... + 31198824.

It is an arithmetic number, because the mean of its divisors is an integer number (1979983791135).

Almost surely, 2^{21002220220022} is an apocalyptic number.

21002220220022 is a deficient number, since it is larger than the sum of its proper divisors (10677520438138).

21002220220022 is a wasteful number, since it uses less digits than its factorization.

21002220220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766975.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21002220220022 its reverse (22002202220012), we get a palindrome (43004422440034).

The spelling of 21002220220022 in words is "twenty-one trillion, two billion, two hundred twenty million, two hundred twenty thousand, twenty-two".