12291720077 has 16 divisors (see below), whose sum is σ = 15152780160. Its totient is φ = 9709561152.

The previous prime is 12291720043. The next prime is 12291720097. The reversal of 12291720077 is 77002719221.

12291720077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12291720077 - 2²⁰ = 12290671501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12291720077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291720097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52778 + ... + 165435.

It is an arithmetic number, because the mean of its divisors is an integer number (947048760).

Almost surely, 2^12291720077 is an apocalyptic number.

It is an amenable number.

12291720077 is a deficient number, since it is larger than the sum of its proper divisors (2861060083).

12291720077 is a wasteful number, since it uses less digits than its factorization.

12291720077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218852.

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 12291720077 in words is "twelve billion, two hundred ninety-one million, seven hundred twenty thousand, seventy-seven".