12144040221 has 8 divisors (see below), whose sum is σ = 16343381664. Its totient is φ = 8020362800.

The previous prime is 12144040213. The next prime is 12144040229. The reversal of 12144040221 is 12204044121.

It is an interprime number because it is at equal distance from previous prime (12144040213) and next prime (12144040229).

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

It is a cyclic number.

It is not a de Polignac number, because 12144040221 - 2³ = 12144040213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144040229) 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, 18915630 + ... + 18916271.

It is an arithmetic number, because the mean of its divisors is an integer number (2042922708).

Almost surely, 2^12144040221 is an apocalyptic number.

It is an amenable number.

12144040221 is a deficient number, since it is larger than the sum of its proper divisors (4199341443).

12144040221 is a wasteful number, since it uses less digits than its factorization.

12144040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37832011.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12144040221 its reverse (12204044121), we get a palindrome (24348084342).

The spelling of 12144040221 in words is "twelve billion, one hundred forty-four million, forty thousand, two hundred twenty-one".