12226055721 has 64 divisors (see below), whose sum is σ = 18637516800. Its totient is φ = 7064179200.

The previous prime is 12226055719. The next prime is 12226055731. The reversal of 12226055721 is 12755062221.

It is not a de Polignac number, because 12226055721 - 2¹ = 12226055719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12226055731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11436375 + ... + 11437443.

It is an arithmetic number, because the mean of its divisors is an integer number (291211200).

Almost surely, 2^12226055721 is an apocalyptic number.

12226055721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12226055721 is a deficient number, since it is larger than the sum of its proper divisors (6411461079).

12226055721 is a wasteful number, since it uses less digits than its factorization.

12226055721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310.

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 12226055721 in words is "twelve billion, two hundred twenty-six million, fifty-five thousand, seven hundred twenty-one".