1321143351 has 16 divisors (see below), whose sum is σ = 1962551808. Its totient is φ = 783656000.

The previous prime is 1321143347. The next prime is 1321143377. The reversal of 1321143351 is 1533411231.

It is a cyclic number.

It is not a de Polignac number, because 1321143351 - 2² = 1321143347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321143751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424350 + ... + 427451.

It is an arithmetic number, because the mean of its divisors is an integer number (122659488).

Almost surely, 2^1321143351 is an apocalyptic number.

1321143351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321143351 is a deficient number, since it is larger than the sum of its proper divisors (641408457).

1321143351 is a wasteful number, since it uses less digits than its factorization.

1321143351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851862.

The product of its digits is 1080, while the sum is 24.

The square root of 1321143351 is about 36347.5356936340. The cubic root of 1321143351 is about 1097.2779392398.

Adding to 1321143351 its reverse (1533411231), we get a palindrome (2854554582).

The spelling of 1321143351 in words is "one billion, three hundred twenty-one million, one hundred forty-three thousand, three hundred fifty-one".