102001021249 has 2 divisors, whose sum is σ = 102001021250. Its totient is φ = 102001021248.

The previous prime is 102001021141. The next prime is 102001021277. The reversal of 102001021249 is 942120100201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61335475600 + 40665545649 = 247660^2 + 201657^2 .

It is a cyclic number.

It is not a de Polignac number, because 102001021249 - 2²³ = 101992632641 is a prime.

It is not a weakly prime, because it can be changed into another prime (102001021279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000510624 + 51000510625.

It is an arithmetic number, because the mean of its divisors is an integer number (51000510625).

Almost surely, 2^102001021249 is an apocalyptic number.

It is an amenable number.

102001021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001021249 is an equidigital number, since it uses as much as digits as its factorization.

102001021249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 102001021249 in words is "one hundred two billion, one million, twenty-one thousand, two hundred forty-nine".