12143222581 has 12 divisors (see below), whose sum is σ = 14196784800. Its totient is φ = 10356164280.

The previous prime is 12143222573. The next prime is 12143222593. The reversal of 12143222581 is 18522234121.

It is a happy number.

It is not a de Polignac number, because 12143222581 - 2³ = 12143222573 is a prime.

It is a super-2 number, since 2×12143222581² (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 (12143222521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612915 + ... + 632416.

It is an arithmetic number, because the mean of its divisors is an integer number (1183065400).

Almost surely, 2^12143222581 is an apocalyptic number.

It is an amenable number.

12143222581 is a deficient number, since it is larger than the sum of its proper divisors (2053562219).

12143222581 is a wasteful number, since it uses less digits than its factorization.

12143222581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245544 (or 1245537 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The spelling of 12143222581 in words is "twelve billion, one hundred forty-three million, two hundred twenty-two thousand, five hundred eighty-one".