2100111117997 has 2 divisors, whose sum is σ = 2100111117998. Its totient is φ = 2100111117996.

The previous prime is 2100111117983. The next prime is 2100111118037. The reversal of 2100111117997 is 7997111110012.

It is an a-pointer prime, because the next prime (2100111118037) can be obtained adding 2100111117997 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2085234193156 + 14876924841 = 1444034^2 + 121971^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100111117997 - 2¹⁵ = 2100111085229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100111117977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050055558998 + 1050055558999.

It is an arithmetic number, because the mean of its divisors is an integer number (1050055558999).

Almost surely, 2^{2100111117997} is an apocalyptic number.

It is an amenable number.

2100111117997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100111117997 is an equidigital number, since it uses as much as digits as its factorization.

2100111117997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 40.

The spelling of 2100111117997 in words is "two trillion, one hundred billion, one hundred eleven million, one hundred seventeen thousand, nine hundred ninety-seven".