202102103309 has 2 divisors, whose sum is σ = 202102103310. Its totient is φ = 202102103308.

The previous prime is 202102103303. The next prime is 202102103317. The reversal of 202102103309 is 903301201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202059240100 + 42863209 = 449510^2 + 6547^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102103309 - 2¹⁶ = 202102037773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202102103303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051051654 + 101051051655.

It is an arithmetic number, because the mean of its divisors is an integer number (101051051655).

Almost surely, 2^202102103309 is an apocalyptic number.

It is an amenable number.

202102103309 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102103309 is an equidigital number, since it uses as much as digits as its factorization.

202102103309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 202102103309 in words is "two hundred two billion, one hundred two million, one hundred three thousand, three hundred nine".