12440133221 has 2 divisors, whose sum is σ = 12440133222. Its totient is φ = 12440133220.

The previous prime is 12440133191. The next prime is 12440133301. The reversal of 12440133221 is 12233104421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9891297025 + 2548836196 = 99455^2 + 50486^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440133221 - 2²² = 12435938917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12040133221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220066610 + 6220066611.

It is an arithmetic number, because the mean of its divisors is an integer number (6220066611).

Almost surely, 2^12440133221 is an apocalyptic number.

It is an amenable number.

12440133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440133221 is an equidigital number, since it uses as much as digits as its factorization.

12440133221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12440133221 its reverse (12233104421), we get a palindrome (24673237642).

The spelling of 12440133221 in words is "twelve billion, four hundred forty million, one hundred thirty-three thousand, two hundred twenty-one".