21220102212010 has 64 divisors (see below), whose sum is σ = 41692053521664. Its totient is φ = 7729405286400.

The previous prime is 21220102211999. The next prime is 21220102212011. The reversal of 21220102212010 is 1021220102212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21220102212011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1216245 + ... + 6627175.

It is an arithmetic number, because the mean of its divisors is an integer number (651438336276).

Almost surely, 2^{21220102212010} is an apocalyptic number.

21220102212010 is a deficient number, since it is larger than the sum of its proper divisors (20471951309654).

21220102212010 is a wasteful number, since it uses less digits than its factorization.

21220102212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411359.

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

Adding to 21220102212010 its reverse (1021220102212), we get a palindrome (22241322314222).

The spelling of 21220102212010 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred twelve thousand, ten".