102000310021 has 2 divisors, whose sum is σ = 102000310022. Its totient is φ = 102000310020.

The previous prime is 102000310007. The next prime is 102000310039. The reversal of 102000310021 is 120013000201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101817789921 + 182520100 = 319089^2 + 13510^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000310021 - 2²⁵ = 101966755589 is a prime.

It is a super-2 number, since 2×102000310021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102000310421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000155010 + 51000155011.

It is an arithmetic number, because the mean of its divisors is an integer number (51000155011).

Almost surely, 2^102000310021 is an apocalyptic number.

It is an amenable number.

102000310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102000310021 is an equidigital number, since it uses as much as digits as its factorization.

102000310021 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 10.

Adding to 102000310021 its reverse (120013000201), we get a palindrome (222013310222).

The spelling of 102000310021 in words is "one hundred two billion, three hundred ten thousand, twenty-one".