12321999953 has 2 divisors, whose sum is σ = 12321999954. Its totient is φ = 12321999952.

The previous prime is 12321999929. The next prime is 12322000007. The reversal of 12321999953 is 35999912321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6584997904 + 5737002049 = 81148^2 + 75743^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321999953 - 2⁶ = 12321999889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321999895 and 12321999904.

It is not a weakly prime, because it can be changed into another prime (12321999923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160999976 + 6160999977.

It is an arithmetic number, because the mean of its divisors is an integer number (6160999977).

Almost surely, 2^12321999953 is an apocalyptic number.

It is an amenable number.

12321999953 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321999953 is an equidigital number, since it uses as much as digits as its factorization.

12321999953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1180980, while the sum is 53.

The spelling of 12321999953 in words is "twelve billion, three hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred fifty-three".