21102022012210 has 8 divisors (see below), whose sum is σ = 37983639621996. Its totient is φ = 8440808804880.

The previous prime is 21102022012193. The next prime is 21102022012289. The reversal of 21102022012210 is 1221022020112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20849187020281 + 252834991929 = 4566091^2 + 502827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055101100601 + ... + 1055101100620.

Almost surely, 2^{21102022012210} is an apocalyptic number.

21102022012210 is a deficient number, since it is larger than the sum of its proper divisors (16881617609786).

21102022012210 is a wasteful number, since it uses less digits than its factorization.

21102022012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110202201228.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21102022012210 its reverse (1221022020112), we get a palindrome (22323044032322).

The spelling of 21102022012210 in words is "twenty-one trillion, one hundred two billion, twenty-two million, twelve thousand, two hundred ten".