102310001021 has 2 divisors, whose sum is σ = 102310001022. Its totient is φ = 102310001020.

The previous prime is 102310001011. The next prime is 102310001023. The reversal of 102310001021 is 120100013201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91046424121 + 11263576900 = 301739^2 + 106130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102310001021 is a prime.

Together with 102310001023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102310000993 and 102310001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102310001023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51155000510 + 51155000511.

It is an arithmetic number, because the mean of its divisors is an integer number (51155000511).

Almost surely, 2^102310001021 is an apocalyptic number.

It is an amenable number.

102310001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102310001021 is an equidigital number, since it uses as much as digits as its factorization.

102310001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 102310001021 its reverse (120100013201), we get a palindrome (222410014222).

The spelling of 102310001021 in words is "one hundred two billion, three hundred ten million, one thousand, twenty-one".