12221312231 has 8 divisors (see below), whose sum is σ = 12262204560. Its totient is φ = 12180474432.

The previous prime is 12221312227. The next prime is 12221312261. The reversal of 12221312231 is 13221312221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221312231 - 2² = 12221312227 is a prime.

It is a super-2 number, since 2×12221312231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221312261) 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 7 ways as a sum of consecutive naturals, for example, 462821 + ... + 488513.

It is an arithmetic number, because the mean of its divisors is an integer number (1532775570).

Almost surely, 2^12221312231 is an apocalyptic number.

12221312231 is a deficient number, since it is larger than the sum of its proper divisors (40892329).

12221312231 is a wasteful number, since it uses less digits than its factorization.

12221312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27265.

The product of its digits is 288, while the sum is 20.

Adding to 12221312231 its reverse (13221312221), we get a palindrome (25442624452).

The spelling of 12221312231 in words is "twelve billion, two hundred twenty-one million, three hundred twelve thousand, two hundred thirty-one".