12140541221 has 4 divisors (see below), whose sum is σ = 12143081100. Its totient is φ = 12138001344.

The previous prime is 12140541209. The next prime is 12140541227. The reversal of 12140541221 is 12214504121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7483980100 + 4656561121 = 86510^2 + 68239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12140541221 is a prime.

It is a super-2 number, since 2×12140541221² (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 (12140541227) 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, 1262756 + ... + 1272333.

It is an arithmetic number, because the mean of its divisors is an integer number (3035770275).

Almost surely, 2^12140541221 is an apocalyptic number.

It is an amenable number.

12140541221 is a deficient number, since it is larger than the sum of its proper divisors (2539879).

12140541221 is an equidigital number, since it uses as much as digits as its factorization.

12140541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539878.

The product of its (nonzero) digits is 640, while the sum is 23.

The spelling of 12140541221 in words is "twelve billion, one hundred forty million, five hundred forty-one thousand, two hundred twenty-one".