1344131221 has 2 divisors, whose sum is σ = 1344131222. Its totient is φ = 1344131220.

The previous prime is 1344131207. The next prime is 1344131233. The reversal of 1344131221 is 1221314431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975875121 + 368256100 = 31239^2 + 19190^2 .

It is an emirp because it is prime and its reverse (1221314431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1344131221 - 2⁵ = 1344131189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1344131192 and 1344131201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344132221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672065610 + 672065611.

It is an arithmetic number, because the mean of its divisors is an integer number (672065611).

Almost surely, 2^1344131221 is an apocalyptic number.

It is an amenable number.

1344131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344131221 is an equidigital number, since it uses as much as digits as its factorization.

1344131221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 1344131221 is about 36662.3951890762. The cubic root of 1344131221 is about 1103.6055849381.

Adding to 1344131221 its reverse (1221314431), we get a palindrome (2565445652).

The spelling of 1344131221 in words is "one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred twenty-one".