12304149821 has 2 divisors, whose sum is σ = 12304149822. Its totient is φ = 12304149820.

The previous prime is 12304149799. The next prime is 12304149833. The reversal of 12304149821 is 12894140321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11887540900 + 416608921 = 109030^2 + 20411^2 .

It is an emirp because it is prime and its reverse (12894140321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12304149821 is a prime.

It is a super-2 number, since 2×12304149821² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12304149421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152074910 + 6152074911.

It is an arithmetic number, because the mean of its divisors is an integer number (6152074911).

Almost surely, 2^12304149821 is an apocalyptic number.

It is an amenable number.

12304149821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12304149821 is an equidigital number, since it uses as much as digits as its factorization.

12304149821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 12304149821 in words is "twelve billion, three hundred four million, one hundred forty-nine thousand, eight hundred twenty-one".