100920191089 has 2 divisors, whose sum is σ = 100920191090. Its totient is φ = 100920191088.

The previous prime is 100920191063. The next prime is 100920191101. The reversal of 100920191089 is 980191029001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98360640625 + 2559550464 = 313625^2 + 50592^2 .

It is a cyclic number.

It is not a de Polignac number, because 100920191089 - 2¹⁵ = 100920158321 is a prime.

It is not a weakly prime, because it can be changed into another prime (100920192089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50460095544 + 50460095545.

It is an arithmetic number, because the mean of its divisors is an integer number (50460095545).

Almost surely, 2^100920191089 is an apocalyptic number.

It is an amenable number.

100920191089 is a deficient number, since it is larger than the sum of its proper divisors (1).

100920191089 is an equidigital number, since it uses as much as digits as its factorization.

100920191089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 100920191089 in words is "one hundred billion, nine hundred twenty million, one hundred ninety-one thousand, eighty-nine".