12209317977 has 32 divisors (see below), whose sum is σ = 17733795840. Its totient is φ = 7443360000.

The previous prime is 12209317949. The next prime is 12209317997. The reversal of 12209317977 is 77971390221.

It is not a de Polignac number, because 12209317977 - 2⁷ = 12209317849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12209317997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699952 + ... + 717182.

It is an arithmetic number, because the mean of its divisors is an integer number (554181120).

Almost surely, 2^12209317977 is an apocalyptic number.

It is an amenable number.

12209317977 is a deficient number, since it is larger than the sum of its proper divisors (5524477863).

12209317977 is a wasteful number, since it uses less digits than its factorization.

12209317977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17685.

The product of its (nonzero) digits is 333396, while the sum is 48.

The spelling of 12209317977 in words is "twelve billion, two hundred nine million, three hundred seventeen thousand, nine hundred seventy-seven".