1321011423 has 36 divisors (see below), whose sum is σ = 2085898360. Its totient is φ = 834244272.

The previous prime is 1321011409. The next prime is 1321011437. The reversal of 1321011423 is 3241101231.

It is an interprime number because it is at equal distance from previous prime (1321011409) and next prime (1321011437).

It is not a de Polignac number, because 1321011423 - 2¹⁰ = 1321010399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321011396 and 1321011405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321011023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 119361 + ... + 129957.

Almost surely, 2^1321011423 is an apocalyptic number.

1321011423 is a deficient number, since it is larger than the sum of its proper divisors (764886937).

1321011423 is an frugal number, since it uses more digits than its factorization.

1321011423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10640 (or 10619 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1321011423 is about 36345.7208347833. The cubic root of 1321011423 is about 1097.2414136797.

Adding to 1321011423 its reverse (3241101231), we get a palindrome (4562112654).

The spelling of 1321011423 in words is "one billion, three hundred twenty-one million, eleven thousand, four hundred twenty-three".