1421311323 has 4 divisors (see below), whose sum is σ = 1895081768. Its totient is φ = 947540880.

The previous prime is 1421311319. The next prime is 1421311337. The reversal of 1421311323 is 3231131241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1421311323 - 2² = 1421311319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421311323.

It is not an unprimeable number, because it can be changed into a prime (1421312323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236885218 + ... + 236885223.

It is an arithmetic number, because the mean of its divisors is an integer number (473770442).

Almost surely, 2^1421311323 is an apocalyptic number.

1421311323 is a deficient number, since it is larger than the sum of its proper divisors (473770445).

1421311323 is an equidigital number, since it uses as much as digits as its factorization.

1421311323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473770444.

The product of its digits is 432, while the sum is 21.

The square root of 1421311323 is about 37700.2827973478. The cubic root of 1421311323 is about 1124.3367476192.

Adding to 1421311323 its reverse (3231131241), we get a palindrome (4652442564).

The spelling of 1421311323 in words is "one billion, four hundred twenty-one million, three hundred eleven thousand, three hundred twenty-three".