12221334391 has 16 divisors (see below), whose sum is σ = 14895256320. Its totient is φ = 9788284800.

The previous prime is 12221334353. The next prime is 12221334401. The reversal of 12221334391 is 19343312221.

It is a happy number.

It is not a de Polignac number, because 12221334391 - 2⁷ = 12221334263 is a prime.

It is a super-2 number, since 2×12221334391² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221334331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352885 + ... + 385966.

It is an arithmetic number, because the mean of its divisors is an integer number (930953520).

Almost surely, 2^12221334391 is an apocalyptic number.

12221334391 is a deficient number, since it is larger than the sum of its proper divisors (2673921929).

12221334391 is a wasteful number, since it uses less digits than its factorization.

12221334391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739014.

The product of its digits is 7776, while the sum is 31.

The spelling of 12221334391 in words is "twelve billion, two hundred twenty-one million, three hundred thirty-four thousand, three hundred ninety-one".