201021210210901 has 2 divisors, whose sum is σ = 201021210210902. Its totient is φ = 201021210210900.

The previous prime is 201021210210839. The next prime is 201021210210943. The reversal of 201021210210901 is 109012012120102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101246882746801 + 99774327464100 = 10062151^2 + 9988710^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021210210901 - 2⁴¹ = 198822186955349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021210210991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510605105450 + 100510605105451.

It is an arithmetic number, because the mean of its divisors is an integer number (100510605105451).

Almost surely, 2^{201021210210901} is an apocalyptic number.

It is an amenable number.

201021210210901 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021210210901 is an equidigital number, since it uses as much as digits as its factorization.

201021210210901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 201021210210901 in words is "two hundred one trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, nine hundred one".