231302021212309 has 2 divisors, whose sum is σ = 231302021212310. Its totient is φ = 231302021212308.

The previous prime is 231302021212303. The next prime is 231302021212343. The reversal of 231302021212309 is 903212120203132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229233377607025 + 2068643605284 = 15140455^2 + 1438278^2 .

It is a cyclic number.

It is not a de Polignac number, because 231302021212309 - 2¹¹ = 231302021210261 is a prime.

It is a super-2 number, since 2×231302021212309² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231302021212303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651010606154 + 115651010606155.

It is an arithmetic number, because the mean of its divisors is an integer number (115651010606155).

Almost surely, 2^{231302021212309} is an apocalyptic number.

It is an amenable number.

231302021212309 is a deficient number, since it is larger than the sum of its proper divisors (1).

231302021212309 is an equidigital number, since it uses as much as digits as its factorization.

231302021212309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 231302021212309 in words is "two hundred thirty-one trillion, three hundred two billion, twenty-one million, two hundred twelve thousand, three hundred nine".