200111101901 has 2 divisors, whose sum is σ = 200111101902. Its totient is φ = 200111101900.

The previous prime is 200111101877. The next prime is 200111101919. The reversal of 200111101901 is 109101111002.

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., 195708912100 + 4402189801 = 442390^2 + 66349^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111101901 - 2⁶ = 200111101837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200111101901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200111100901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055550950 + 100055550951.

It is an arithmetic number, because the mean of its divisors is an integer number (100055550951).

Almost surely, 2^200111101901 is an apocalyptic number.

It is an amenable number.

200111101901 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111101901 is an equidigital number, since it uses as much as digits as its factorization.

200111101901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 200111101901 its reverse (109101111002), we get a palindrome (309212212903).

The spelling of 200111101901 in words is "two hundred billion, one hundred eleven million, one hundred one thousand, nine hundred one".