20110111095917 has 2 divisors, whose sum is σ = 20110111095918. Its totient is φ = 20110111095916.

The previous prime is 20110111095883. The next prime is 20110111096001. The reversal of 20110111095917 is 71959011101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18657095416996 + 1453015678921 = 4319386^2 + 1205411^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110111095917 - 2³⁴ = 20092931226733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110111695917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055055547958 + 10055055547959.

It is an arithmetic number, because the mean of its divisors is an integer number (10055055547959).

Almost surely, 2^{20110111095917} is an apocalyptic number.

It is an amenable number.

20110111095917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110111095917 is an equidigital number, since it uses as much as digits as its factorization.

20110111095917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 38.

The spelling of 20110111095917 in words is "twenty trillion, one hundred ten billion, one hundred eleven million, ninety-five thousand, nine hundred seventeen".