12020759977 has 2 divisors, whose sum is σ = 12020759978. Its totient is φ = 12020759976.

The previous prime is 12020759953. The next prime is 12020759987. The reversal of 12020759977 is 77995702021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6792891561 + 5227868416 = 82419^2 + 72304^2 .

It is an emirp because it is prime and its reverse (77995702021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12020759977 - 2²⁷ = 11886542249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12020759977.

It is not a weakly prime, because it can be changed into another prime (12020759987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010379988 + 6010379989.

It is an arithmetic number, because the mean of its divisors is an integer number (6010379989).

Almost surely, 2^12020759977 is an apocalyptic number.

It is an amenable number.

12020759977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020759977 is an equidigital number, since it uses as much as digits as its factorization.

12020759977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 555660, while the sum is 49.

The spelling of 12020759977 in words is "twelve billion, twenty million, seven hundred fifty-nine thousand, nine hundred seventy-seven".