102312021211009 has 2 divisors, whose sum is σ = 102312021211010. Its totient is φ = 102312021211008.

The previous prime is 102312021211007. The next prime is 102312021211091. The reversal of 102312021211009 is 900112120213201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86718186307600 + 15593834903409 = 9312260^2 + 3948903^2 .

It is a cyclic number.

It is not a de Polignac number, because 102312021211009 - 2¹ = 102312021211007 is a prime.

Together with 102312021211007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102312021211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51156010605504 + 51156010605505.

It is an arithmetic number, because the mean of its divisors is an integer number (51156010605505).

Almost surely, 2^{102312021211009} is an apocalyptic number.

It is an amenable number.

102312021211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

102312021211009 is an equidigital number, since it uses as much as digits as its factorization.

102312021211009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 102312021211009 in words is "one hundred two trillion, three hundred twelve billion, twenty-one million, two hundred eleven thousand, nine".