20120100089 has 2 divisors, whose sum is σ = 20120100090. Its totient is φ = 20120100088.

The previous prime is 20120100023. The next prime is 20120100101. The reversal of 20120100089 is 98000102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11413717225 + 8706382864 = 106835^2 + 93308^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120100089 - 2⁸ = 20120099833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20120100289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060050044 + 10060050045.

It is an arithmetic number, because the mean of its divisors is an integer number (10060050045).

Almost surely, 2^20120100089 is an apocalyptic number.

It is an amenable number.

20120100089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120100089 is an equidigital number, since it uses as much as digits as its factorization.

20120100089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 20120100089 in words is "twenty billion, one hundred twenty million, one hundred thousand, eighty-nine".