20110100089 has 2 divisors, whose sum is σ = 20110100090. Its totient is φ = 20110100088.

The previous prime is 20110100077. The next prime is 20110100093. The reversal of 20110100089 is 98000101102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13039812864 + 7070287225 = 114192^2 + 84085^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110100089 - 2⁵ = 20110100057 is a prime.

It is a super-2 number, since 2×20110100089² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20110100009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055050044 + 10055050045.

It is an arithmetic number, because the mean of its divisors is an integer number (10055050045).

Almost surely, 2^20110100089 is an apocalyptic number.

It is an amenable number.

20110100089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110100089 is an equidigital number, since it uses as much as digits as its factorization.

20110100089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20110100089 in words is "twenty billion, one hundred ten million, one hundred thousand, eighty-nine".