12642027321 has 32 divisors (see below), whose sum is σ = 22121395200. Its totient is φ = 6221638080.

The previous prime is 12642027317. The next prime is 12642027353. The reversal of 12642027321 is 12372024621.

It is not a de Polignac number, because 12642027321 - 2² = 12642027317 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12642027311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1435806 + ... + 1444583.

It is an arithmetic number, because the mean of its divisors is an integer number (691293600).

Almost surely, 2^12642027321 is an apocalyptic number.

12642027321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12642027321 is a deficient number, since it is larger than the sum of its proper divisors (9479367879).

12642027321 is a wasteful number, since it uses less digits than its factorization.

12642027321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880429.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 12642027321 in words is "twelve billion, six hundred forty-two million, twenty-seven thousand, three hundred twenty-one".