20111020199 has 2 divisors, whose sum is σ = 20111020200. Its totient is φ = 20111020198.

The previous prime is 20111020159. The next prime is 20111020207. The reversal of 20111020199 is 99102011102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111020199 - 2²⁴ = 20094242983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111020159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055510099 + 10055510100.

It is an arithmetic number, because the mean of its divisors is an integer number (10055510100).

Almost surely, 2^20111020199 is an apocalyptic number.

20111020199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111020199 is an equidigital number, since it uses as much as digits as its factorization.

20111020199 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 26.

The spelling of 20111020199 in words is "twenty billion, one hundred eleven million, twenty thousand, one hundred ninety-nine".