1421131321 has 2 divisors, whose sum is σ = 1421131322. Its totient is φ = 1421131320.

The previous prime is 1421131319. The next prime is 1421131331. The reversal of 1421131321 is 1231311241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018567225 + 402564096 = 31915^2 + 20064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421131321 - 2¹ = 1421131319 is a prime.

It is a super-2 number, since 2×1421131321² = 4039228463054410082, which contains 22 as substring.

Together with 1421131319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1421131301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710565660 + 710565661.

It is an arithmetic number, because the mean of its divisors is an integer number (710565661).

Almost surely, 2^1421131321 is an apocalyptic number.

It is an amenable number.

1421131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421131321 is an equidigital number, since it uses as much as digits as its factorization.

1421131321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 1421131321 is about 37697.8954452367. The cubic root of 1421131321 is about 1124.2892817323.

Adding to 1421131321 its reverse (1231311241), we get a palindrome (2652442562).

The spelling of 1421131321 in words is "one billion, four hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-one".