1421423321 has 2 divisors, whose sum is σ = 1421423322. Its totient is φ = 1421423320.

The previous prime is 1421423317. The next prime is 1421423357. The reversal of 1421423321 is 1233241241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1264798096 + 156625225 = 35564^2 + 12515^2 .

It is an emirp because it is prime and its reverse (1233241241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421423321 - 2² = 1421423317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421420321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710711660 + 710711661.

It is an arithmetic number, because the mean of its divisors is an integer number (710711661).

Almost surely, 2^1421423321 is an apocalyptic number.

It is an amenable number.

1421423321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421423321 is an equidigital number, since it uses as much as digits as its factorization.

1421423321 is an evil number, because the sum of its binary digits is even.

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

The square root of 1421423321 is about 37701.7681415607. The cubic root of 1421423321 is about 1124.3662790708.

Adding to 1421423321 its reverse (1233241241), we get a palindrome (2654664562).

The spelling of 1421423321 in words is "one billion, four hundred twenty-one million, four hundred twenty-three thousand, three hundred twenty-one".