12777721322 has 32 divisors (see below), whose sum is σ = 20459977920. Its totient is φ = 5964053760.

The previous prime is 12777721289. The next prime is 12777721337. The reversal of 12777721322 is 22312777721.

It is a self number, because there is not a number n which added to its sum of digits gives 12777721322.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2559713 + ... + 2564699.

It is an arithmetic number, because the mean of its divisors is an integer number (639374310).

Almost surely, 2^12777721322 is an apocalyptic number.

12777721322 is a deficient number, since it is larger than the sum of its proper divisors (7682256598).

12777721322 is a wasteful number, since it uses less digits than its factorization.

12777721322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606.

The product of its digits is 115248, while the sum is 41.

The spelling of 12777721322 in words is "twelve billion, seven hundred seventy-seven million, seven hundred twenty-one thousand, three hundred twenty-two".