102240304861 has 2 divisors, whose sum is σ = 102240304862. Its totient is φ = 102240304860.

The previous prime is 102240304807. The next prime is 102240304883. The reversal of 102240304861 is 168403042201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101994003225 + 246301636 = 319365^2 + 15694^2 .

It is a cyclic number.

It is not a de Polignac number, because 102240304861 - 2²³ = 102231916253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102240302861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51120152430 + 51120152431.

It is an arithmetic number, because the mean of its divisors is an integer number (51120152431).

Almost surely, 2^102240304861 is an apocalyptic number.

It is an amenable number.

102240304861 is a deficient number, since it is larger than the sum of its proper divisors (1).

102240304861 is an equidigital number, since it uses as much as digits as its factorization.

102240304861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 102240304861 in words is "one hundred two billion, two hundred forty million, three hundred four thousand, eight hundred sixty-one".