202110000200021 has 2 divisors, whose sum is σ = 202110000200022. Its totient is φ = 202110000200020.

The previous prime is 202110000199999. The next prime is 202110000200027. The reversal of 202110000200021 is 120002000011202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128549359637521 + 73560640562500 = 11337961^2 + 8576750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202110000200021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202110000199975 and 202110000200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202110000200027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055000100010 + 101055000100011.

It is an arithmetic number, because the mean of its divisors is an integer number (101055000100011).

Almost surely, 2^{202110000200021} is an apocalyptic number.

It is an amenable number.

202110000200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202110000200021 is an equidigital number, since it uses as much as digits as its factorization.

202110000200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202110000200021 its reverse (120002000011202), we get a palindrome (322112000211223).

The spelling of 202110000200021 in words is "two hundred two trillion, one hundred ten billion, two hundred thousand, twenty-one".