12101019977 has 2 divisors, whose sum is σ = 12101019978. Its totient is φ = 12101019976.

The previous prime is 12101019949. The next prime is 12101020027. The reversal of 12101019977 is 77991010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10940323216 + 1160696761 = 104596^2 + 34069^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101019977 - 2⁶ = 12101019913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12101019977.

It is not a weakly prime, because it can be changed into another prime (12101319977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050509988 + 6050509989.

It is an arithmetic number, because the mean of its divisors is an integer number (6050509989).

Almost surely, 2^12101019977 is an apocalyptic number.

It is an amenable number.

12101019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101019977 is an equidigital number, since it uses as much as digits as its factorization.

12101019977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 38.

The spelling of 12101019977 in words is "twelve billion, one hundred one million, nineteen thousand, nine hundred seventy-seven".