21031223013089 has 2 divisors, whose sum is σ = 21031223013090. Its totient is φ = 21031223013088.

The previous prime is 21031223013067. The next prime is 21031223013103. The reversal of 21031223013089 is 98031032213012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18792294360064 + 2238928653025 = 4335008^2 + 1496305^2 .

It is a cyclic number.

It is not a de Polignac number, because 21031223013089 - 2²⁰ = 21031221964513 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 (21031223019089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515611506544 + 10515611506545.

It is an arithmetic number, because the mean of its divisors is an integer number (10515611506545).

Almost surely, 2^{21031223013089} is an apocalyptic number.

It is an amenable number.

21031223013089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031223013089 is an equidigital number, since it uses as much as digits as its factorization.

21031223013089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 21031223013089 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-three million, thirteen thousand, eighty-nine".