10011111109897 has 2 divisors, whose sum is σ = 10011111109898. Its totient is φ = 10011111109896.

The previous prime is 10011111109849. The next prime is 10011111110027. The reversal of 10011111109897 is 79890111111001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8660283722896 + 1350827387001 = 2942836^2 + 1162251^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011111109897 - 2²³ = 10011102721289 is a prime.

It is a super-2 number, since 2×10011111109897² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10011111109847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005555554948 + 5005555554949.

It is an arithmetic number, because the mean of its divisors is an integer number (5005555554949).

Almost surely, 2^{10011111109897} is an apocalyptic number.

It is an amenable number.

10011111109897 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011111109897 is an equidigital number, since it uses as much as digits as its factorization.

10011111109897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 40.

The spelling of 10011111109897 in words is "ten trillion, eleven billion, one hundred eleven million, one hundred nine thousand, eight hundred ninety-seven".