202100110010021 has 2 divisors, whose sum is σ = 202100110010022. Its totient is φ = 202100110010020.

The previous prime is 202100110009991. The next prime is 202100110010081. The reversal of 202100110010021 is 120010011001202.

202100110010021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116238370332100 + 85861739677921 = 10781390^2 + 9266161^2 .

It is a cyclic number.

It is not a de Polignac number, because 202100110010021 - 2¹⁴ = 202100109993637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202100110009984 and 202100110010011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202100110010081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050055005010 + 101050055005011.

It is an arithmetic number, because the mean of its divisors is an integer number (101050055005011).

Almost surely, 2^{202100110010021} is an apocalyptic number.

It is an amenable number.

202100110010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202100110010021 is an equidigital number, since it uses as much as digits as its factorization.

202100110010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202100110010021 its reverse (120010011001202), we get a palindrome (322110121011223).

The spelling of 202100110010021 in words is "two hundred two trillion, one hundred billion, one hundred ten million, ten thousand, twenty-one".