12357583921 has 2 divisors, whose sum is σ = 12357583922. Its totient is φ = 12357583920.

The previous prime is 12357583919. The next prime is 12357583937. The reversal of 12357583921 is 12938575321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7996830625 + 4360753296 = 89425^2 + 66036^2 .

It is a cyclic number.

It is not a de Polignac number, because 12357583921 - 2¹ = 12357583919 is a prime.

Together with 12357583919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12357581921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6178791960 + 6178791961.

It is an arithmetic number, because the mean of its divisors is an integer number (6178791961).

Almost surely, 2^12357583921 is an apocalyptic number.

It is an amenable number.

12357583921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12357583921 is an equidigital number, since it uses as much as digits as its factorization.

12357583921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The spelling of 12357583921 in words is "twelve billion, three hundred fifty-seven million, five hundred eighty-three thousand, nine hundred twenty-one".