100111209889 has 2 divisors, whose sum is σ = 100111209890. Its totient is φ = 100111209888.

The previous prime is 100111209857. The next prime is 100111209953. The reversal of 100111209889 is 988902111001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98858049889 + 1253160000 = 314417^2 + 35400^2 .

It is a cyclic number.

It is not a de Polignac number, because 100111209889 - 2⁵ = 100111209857 is a prime.

It is a super-2 number, since 2×100111209889² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100111209829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055604944 + 50055604945.

It is an arithmetic number, because the mean of its divisors is an integer number (50055604945).

Almost surely, 2^100111209889 is an apocalyptic number.

It is an amenable number.

100111209889 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111209889 is an equidigital number, since it uses as much as digits as its factorization.

100111209889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 100111209889 in words is "one hundred billion, one hundred eleven million, two hundred nine thousand, eight hundred eighty-nine".