21312115010089 has 2 divisors, whose sum is σ = 21312115010090. Its totient is φ = 21312115010088.

The previous prime is 21312115009981. The next prime is 21312115010149. The reversal of 21312115010089 is 98001051121312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10790784814489 + 10521330195600 = 3284933^2 + 3243660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312115010089 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312115010789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656057505044 + 10656057505045.

It is an arithmetic number, because the mean of its divisors is an integer number (10656057505045).

Almost surely, 2^{21312115010089} is an apocalyptic number.

It is an amenable number.

21312115010089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312115010089 is an equidigital number, since it uses as much as digits as its factorization.

21312115010089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 34.

The spelling of 21312115010089 in words is "twenty-one trillion, three hundred twelve billion, one hundred fifteen million, ten thousand, eighty-nine".