12221434767 has 16 divisors (see below), whose sum is σ = 17066972160. Its totient is φ = 7764395232.

The previous prime is 12221434723. The next prime is 12221434801. The reversal of 12221434767 is 76743412221.

It is not a de Polignac number, because 12221434767 - 2⁶ = 12221434703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221434717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310663 + ... + 347784.

It is an arithmetic number, because the mean of its divisors is an integer number (1066685760).

Almost surely, 2^12221434767 is an apocalyptic number.

12221434767 is a deficient number, since it is larger than the sum of its proper divisors (4845537393).

12221434767 is a wasteful number, since it uses less digits than its factorization.

12221434767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658742.

The product of its digits is 112896, while the sum is 39.

Adding to 12221434767 its reverse (76743412221), we get a palindrome (88964846988).

The spelling of 12221434767 in words is "twelve billion, two hundred twenty-one million, four hundred thirty-four thousand, seven hundred sixty-seven".