21201022120210 has 16 divisors (see below), whose sum is σ = 38163708024192. Its totient is φ = 8479993690800.

The previous prime is 21201022120181. The next prime is 21201022120219. The reversal of 21201022120210 is 1202122010212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21201022120219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51680136 + ... + 52088755.

It is an arithmetic number, because the mean of its divisors is an integer number (2385231751512).

Almost surely, 2^{21201022120210} is an apocalyptic number.

21201022120210 is a deficient number, since it is larger than the sum of its proper divisors (16962685903982).

21201022120210 is a wasteful number, since it uses less digits than its factorization.

21201022120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103789329.

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

Adding to 21201022120210 its reverse (1202122010212), we get a palindrome (22403144130422).

The spelling of 21201022120210 in words is "twenty-one trillion, two hundred one billion, twenty-two million, one hundred twenty thousand, two hundred ten".