202100111019901 has 2 divisors, whose sum is σ = 202100111019902. Its totient is φ = 202100111019900.

The previous prime is 202100111019899. The next prime is 202100111020033. The reversal of 202100111019901 is 109910111001202.

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., 143954163648100 + 58145947371801 = 11998090^2 + 7625349^2 .

It is a cyclic number.

It is not a de Polignac number, because 202100111019901 - 2¹ = 202100111019899 is a prime.

Together with 202100111019899, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202100111019901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202100111010901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050055509950 + 101050055509951.

It is an arithmetic number, because the mean of its divisors is an integer number (101050055509951).

Almost surely, 2^{202100111019901} is an apocalyptic number.

It is an amenable number.

202100111019901 is a deficient number, since it is larger than the sum of its proper divisors (1).

202100111019901 is an equidigital number, since it uses as much as digits as its factorization.

202100111019901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 202100111019901 in words is "two hundred two trillion, one hundred billion, one hundred eleven million, nineteen thousand, nine hundred one".