210010122211621 has 2 divisors, whose sum is σ = 210010122211622. Its totient is φ = 210010122211620.

The previous prime is 210010122211583. The next prime is 210010122211627. The reversal of 210010122211621 is 126112221010012.

210010122211621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168273173160225 + 41736949051396 = 12972015^2 + 6460414^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010122211621 - 2²⁵ = 210010088657189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210010122211592 and 210010122211601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210010122211627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005061105810 + 105005061105811.

It is an arithmetic number, because the mean of its divisors is an integer number (105005061105811).

Almost surely, 2^{210010122211621} is an apocalyptic number.

It is an amenable number.

210010122211621 is a deficient number, since it is larger than the sum of its proper divisors (1).

210010122211621 is an equidigital number, since it uses as much as digits as its factorization.

210010122211621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 210010122211621 its reverse (126112221010012), we get a palindrome (336122343221633).

The spelling of 210010122211621 in words is "two hundred ten trillion, ten billion, one hundred twenty-two million, two hundred eleven thousand, six hundred twenty-one".