11011121020997 has 2 divisors, whose sum is σ = 11011121020998. Its totient is φ = 11011121020996.

The previous prime is 11011121020979. The next prime is 11011121021039. The reversal of 11011121020997 is 79902012111011.

Together with previous prime (11011121020979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10651809491521 + 359311529476 = 3263711^2 + 599426^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011121020997 - 2¹⁴ = 11011121004613 is a prime.

It is a super-2 number, since 2×11011121020997² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011121020297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505560510498 + 5505560510499.

It is an arithmetic number, because the mean of its divisors is an integer number (5505560510499).

Almost surely, 2^{11011121020997} is an apocalyptic number.

It is an amenable number.

11011121020997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011121020997 is an equidigital number, since it uses as much as digits as its factorization.

11011121020997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 35.

The spelling of 11011121020997 in words is "eleven trillion, eleven billion, one hundred twenty-one million, twenty thousand, nine hundred ninety-seven".