11111111010997 has 2 divisors, whose sum is σ = 11111111010998. Its totient is φ = 11111111010996.

The previous prime is 11111111010931. The next prime is 11111111011037. The reversal of 11111111010997 is 79901011111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7905313866321 + 3205797144676 = 2811639^2 + 1790474^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111111010997 - 2⁷ = 11111111010869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111111010907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555505498 + 5555555505499.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555505499).

Almost surely, 2^{11111111010997} is an apocalyptic number.

It is an amenable number.

11111111010997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111111010997 is an equidigital number, since it uses as much as digits as its factorization.

11111111010997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 34.

The spelling of 11111111010997 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, ten thousand, nine hundred ninety-seven".