21203320122210 has 32 divisors (see below), whose sum is σ = 50888261399040. Its totient is φ = 5654186131968.

The previous prime is 21203320122191. The next prime is 21203320122241. The reversal of 21203320122210 is 1222102330212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3507279 + ... + 7396461.

It is an arithmetic number, because the mean of its divisors is an integer number (1590258168720).

Almost surely, 2^{21203320122210} is an apocalyptic number.

21203320122210 is an abundant number, since it is smaller than the sum of its proper divisors (29684941276830).

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

21203320122210 is a wasteful number, since it uses less digits than its factorization.

21203320122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070922.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21203320122210 its reverse (1222102330212), we get a palindrome (22425422452422).

The spelling of 21203320122210 in words is "twenty-one trillion, two hundred three billion, three hundred twenty million, one hundred twenty-two thousand, two hundred ten".