11110001121997 has 2 divisors, whose sum is σ = 11110001121998. Its totient is φ = 11110001121996.

The previous prime is 11110001121959. The next prime is 11110001122007. The reversal of 11110001121997 is 79912110001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10340475666921 + 769525455076 = 3215661^2 + 877226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11110001121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11110001121917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555000560998 + 5555000560999.

It is an arithmetic number, because the mean of its divisors is an integer number (5555000560999).

Almost surely, 2^{11110001121997} is an apocalyptic number.

It is an amenable number.

11110001121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11110001121997 is an equidigital number, since it uses as much as digits as its factorization.

11110001121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 34.

The spelling of 11110001121997 in words is "eleven trillion, one hundred ten billion, one million, one hundred twenty-one thousand, nine hundred ninety-seven".