21012210201 has 16 divisors (see below), whose sum is σ = 28879693568. Its totient is φ = 13579228800.

The previous prime is 21012210169. The next prime is 21012210203. The reversal of 21012210201 is 10201221012.

It is not a de Polignac number, because 21012210201 - 2⁵ = 21012210169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012210203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319180 + ... + 379341.

It is an arithmetic number, because the mean of its divisors is an integer number (1804980848).

Almost surely, 2^21012210201 is an apocalyptic number.

It is an amenable number.

21012210201 is a deficient number, since it is larger than the sum of its proper divisors (7867483367).

21012210201 is a wasteful number, since it uses less digits than its factorization.

21012210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698832.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21012210201 its reverse (10201221012), we get a palindrome (31213431213).

The spelling of 21012210201 in words is "twenty-one billion, twelve million, two hundred ten thousand, two hundred one".