12140220221 has 4 divisors (see below), whose sum is σ = 12779179200. Its totient is φ = 11501261244.

The previous prime is 12140220163. The next prime is 12140220347. The reversal of 12140220221 is 12202204121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12140220221 - 2¹⁴ = 12140203837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12140220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140225221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319479461 + ... + 319479498.

It is an arithmetic number, because the mean of its divisors is an integer number (3194794800).

Almost surely, 2^12140220221 is an apocalyptic number.

It is an amenable number.

12140220221 is a deficient number, since it is larger than the sum of its proper divisors (638958979).

12140220221 is an equidigital number, since it uses as much as digits as its factorization.

12140220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638958978.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12140220221 its reverse (12202204121), we get a palindrome (24342424342).

The spelling of 12140220221 in words is "twelve billion, one hundred forty million, two hundred twenty thousand, two hundred twenty-one".