12128212931 has 8 divisors (see below), whose sum is σ = 12675774720. Its totient is φ = 11589274368.

The previous prime is 12128212903. The next prime is 12128212933. The reversal of 12128212931 is 13921282121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12128212931 is a prime.

It is a super-2 number, since 2×12128212931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12128212933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152931 + ... + 2158556.

It is an arithmetic number, because the mean of its divisors is an integer number (1584471840).

Almost surely, 2^12128212931 is an apocalyptic number.

12128212931 is a deficient number, since it is larger than the sum of its proper divisors (547561789).

12128212931 is an equidigital number, since it uses as much as digits as its factorization.

12128212931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311613.

The product of its digits is 3456, while the sum is 32.

The spelling of 12128212931 in words is "twelve billion, one hundred twenty-eight million, two hundred twelve thousand, nine hundred thirty-one".