202110002021 has 2 divisors, whose sum is σ = 202110002022. Its totient is φ = 202110002020.

The previous prime is 202110002009. The next prime is 202110002071. The reversal of 202110002021 is 120200011202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190122160900 + 11987841121 = 436030^2 + 109489^2 .

It is a cyclic number.

It is not a de Polignac number, because 202110002021 - 2¹⁸ = 202109739877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202110001993 and 202110002011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202110002071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055001010 + 101055001011.

It is an arithmetic number, because the mean of its divisors is an integer number (101055001011).

Almost surely, 2^202110002021 is an apocalyptic number.

It is an amenable number.

202110002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202110002021 is an equidigital number, since it uses as much as digits as its factorization.

202110002021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202110002021 its reverse (120200011202), we get a palindrome (322310013223).

The spelling of 202110002021 in words is "two hundred two billion, one hundred ten million, two thousand, twenty-one".