210111102009901 has 2 divisors, whose sum is σ = 210111102009902. Its totient is φ = 210111102009900.

The previous prime is 210111102009839. The next prime is 210111102009959. The reversal of 210111102009901 is 109900201111012.

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., 209844485720100 + 266616289801 = 14486010^2 + 516349^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111102009901 - 2²⁹ = 210110565138989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210111102009901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111102001901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055551004950 + 105055551004951.

It is an arithmetic number, because the mean of its divisors is an integer number (105055551004951).

Almost surely, 2^{210111102009901} is an apocalyptic number.

It is an amenable number.

210111102009901 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111102009901 is an equidigital number, since it uses as much as digits as its factorization.

210111102009901 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 210111102009901 in words is "two hundred ten trillion, one hundred eleven billion, one hundred two million, nine thousand, nine hundred one".