21221020000101 has 32 divisors (see below), whose sum is σ = 30530819491200. Its totient is φ = 13067069368320.

The previous prime is 21221020000069. The next prime is 21221020000157. The reversal of 21221020000101 is 10100002012212.

It is not a de Polignac number, because 21221020000101 - 2⁵ = 21221020000069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221020000171) 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, 430615 + ... + 6528971.

It is an arithmetic number, because the mean of its divisors is an integer number (954088109100).

Almost surely, 2^{21221020000101} is an apocalyptic number.

It is an amenable number.

21221020000101 is a deficient number, since it is larger than the sum of its proper divisors (9309799491099).

21221020000101 is a wasteful number, since it uses less digits than its factorization.

21221020000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099909.

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

Adding to 21221020000101 its reverse (10100002012212), we get a palindrome (31321022012313).

The spelling of 21221020000101 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, one hundred one", and thus it is an aban number.