1321444123 has 2 divisors, whose sum is σ = 1321444124. Its totient is φ = 1321444122.

The previous prime is 1321444121. The next prime is 1321444127. The reversal of 1321444123 is 3214441231.

It is a weak prime.

It is an emirp because it is prime and its reverse (3214441231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321444123 - 2¹ = 1321444121 is a prime.

It is a super-2 number, since 2×1321444123² = 3492429140422478258, which contains 22 as substring.

Together with 1321444121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321444121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660722061 + 660722062.

It is an arithmetic number, because the mean of its divisors is an integer number (660722062).

Almost surely, 2^1321444123 is an apocalyptic number.

1321444123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321444123 is an equidigital number, since it uses as much as digits as its factorization.

1321444123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 1321444123 is about 36351.6729051085. The cubic root of 1321444123 is about 1097.3612018266.

Adding to 1321444123 its reverse (3214441231), we get a palindrome (4535885354).

The spelling of 1321444123 in words is "one billion, three hundred twenty-one million, four hundred forty-four thousand, one hundred twenty-three".