12021299977 has 2 divisors, whose sum is σ = 12021299978. Its totient is φ = 12021299976.

The previous prime is 12021299971. The next prime is 12021300013. The reversal of 12021299977 is 77999212021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10374644736 + 1646655241 = 101856^2 + 40579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021299977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021299977.

It is not a weakly prime, because it can be changed into another prime (12021299971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010649988 + 6010649989.

It is an arithmetic number, because the mean of its divisors is an integer number (6010649989).

Almost surely, 2^12021299977 is an apocalyptic number.

It is an amenable number.

12021299977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021299977 is an equidigital number, since it uses as much as digits as its factorization.

12021299977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 12021299977 in words is "twelve billion, twenty-one million, two hundred ninety-nine thousand, nine hundred seventy-seven".