12721266232 has 32 divisors (see below), whose sum is σ = 25129555200. Its totient is φ = 6020632800.

The previous prime is 12721266227. The next prime is 12721266247. The reversal of 12721266232 is 23266212721.

It is a super-2 number, since 2×12721266232² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142257 + ... + 213727.

It is an arithmetic number, because the mean of its divisors is an integer number (785298600).

Almost surely, 2^12721266232 is an apocalyptic number.

It is an amenable number.

12721266232 is a deficient number, since it is larger than the sum of its proper divisors (12408288968).

12721266232 is a wasteful number, since it uses less digits than its factorization.

12721266232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72667 (or 72663 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

Adding to 12721266232 its reverse (23266212721), we get a palindrome (35987478953).

The spelling of 12721266232 in words is "twelve billion, seven hundred twenty-one million, two hundred sixty-six thousand, two hundred thirty-two".