21000202120101 has 12 divisors (see below), whose sum is σ = 28777486621632. Its totient is φ = 13621752723888.

The previous prime is 21000202120063. The next prime is 21000202120189. The reversal of 21000202120101 is 10102120200012.

It is not a de Polignac number, because 21000202120101 - 2³⁷ = 20862763166629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000202120201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2556631165 + ... + 2556639378.

It is an arithmetic number, because the mean of its divisors is an integer number (2398123885136).

Almost surely, 2^{21000202120101} is an apocalyptic number.

It is an amenable number.

21000202120101 is a deficient number, since it is larger than the sum of its proper divisors (7777284501531).

21000202120101 is an equidigital number, since it uses as much as digits as its factorization.

21000202120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113270620 (or 5113270583 counting only the distinct ones).

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

Adding to 21000202120101 its reverse (10102120200012), we get a palindrome (31102322320113).

The spelling of 21000202120101 in words is "twenty-one trillion, two hundred two million, one hundred twenty thousand, one hundred one".