20210021012210 has 16 divisors (see below), whose sum is σ = 36378259056216. Its totient is φ = 8083959241728.

The previous prime is 20210021012179. The next prime is 20210021012219. The reversal of 20210021012210 is 1221012001202.

It can be written as a sum of positive squares in 4 ways, for example, as 10521051242689 + 9688969769521 = 3243617^2 + 3112711^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20210021012219) 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, 4395119 + ... + 7728978.

Almost surely, 2^{20210021012210} is an apocalyptic number.

20210021012210 is a deficient number, since it is larger than the sum of its proper divisors (16168238044006).

20210021012210 is a wasteful number, since it uses less digits than its factorization.

20210021012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12290797.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20210021012210 its reverse (1221012001202), we get a palindrome (21431033013412).

The spelling of 20210021012210 in words is "twenty trillion, two hundred ten billion, twenty-one million, twelve thousand, two hundred ten".