231102020309 has 2 divisors, whose sum is σ = 231102020310. Its totient is φ = 231102020308.

The previous prime is 231102020299. The next prime is 231102020329. The reversal of 231102020309 is 903020201132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144915739684 + 86186280625 = 380678^2 + 293575^2 .

It is a cyclic number.

It is not a de Polignac number, because 231102020309 - 2¹² = 231102016213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231102020329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115551010154 + 115551010155.

It is an arithmetic number, because the mean of its divisors is an integer number (115551010155).

Almost surely, 2^231102020309 is an apocalyptic number.

It is an amenable number.

231102020309 is a deficient number, since it is larger than the sum of its proper divisors (1).

231102020309 is an equidigital number, since it uses as much as digits as its factorization.

231102020309 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 231102020309 in words is "two hundred thirty-one billion, one hundred two million, twenty thousand, three hundred nine".