199100111101 has 2 divisors, whose sum is σ = 199100111102. Its totient is φ = 199100111100.

The previous prime is 199100111053. The next prime is 199100111143. The reversal of 199100111101 is 101111001991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188443678201 + 10656432900 = 434101^2 + 103230^2 .

It is an emirp because it is prime and its reverse (101111001991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199100111101 - 2⁹ = 199100110589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191100111101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99550055550 + 99550055551.

It is an arithmetic number, because the mean of its divisors is an integer number (99550055551).

Almost surely, 2^199100111101 is an apocalyptic number.

It is an amenable number.

199100111101 is a deficient number, since it is larger than the sum of its proper divisors (1).

199100111101 is an equidigital number, since it uses as much as digits as its factorization.

199100111101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 199100111101 in words is "one hundred ninety-nine billion, one hundred million, one hundred eleven thousand, one hundred one".