21021122100201 has 32 divisors (see below), whose sum is σ = 29707465159680. Its totient is φ = 13184910043200.

The previous prime is 21021122100131. The next prime is 21021122100221. The reversal of 21021122100201 is 10200122112012.

It is not a de Polignac number, because 21021122100201 - 2¹⁷ = 21021121969129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021122100221) 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, 3648756 + ... + 7440138.

It is an arithmetic number, because the mean of its divisors is an integer number (928358286240).

Almost surely, 2^{21021122100201} is an apocalyptic number.

It is an amenable number.

21021122100201 is a deficient number, since it is larger than the sum of its proper divisors (8686343059479).

21021122100201 is a wasteful number, since it uses less digits than its factorization.

21021122100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792077.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021122100201 its reverse (10200122112012), we get a palindrome (31221244212213).

The spelling of 21021122100201 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, one hundred thousand, two hundred one".