1321123315 has 8 divisors (see below), whose sum is σ = 1615260528. Its totient is φ = 1036956960.

The previous prime is 1321123303. The next prime is 1321123337. The reversal of 1321123315 is 5133211231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321123315 - 2¹¹ = 1321121267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2492421 + ... + 2492950.

It is an arithmetic number, because the mean of its divisors is an integer number (201907566).

Almost surely, 2^1321123315 is an apocalyptic number.

1321123315 is a deficient number, since it is larger than the sum of its proper divisors (294137213).

1321123315 is an equidigital number, since it uses as much as digits as its factorization.

1321123315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985429.

The product of its digits is 540, while the sum is 22.

The square root of 1321123315 is about 36347.2600755545. The cubic root of 1321123315 is about 1097.2723922334.

Adding to 1321123315 its reverse (5133211231), we get a palindrome (6454334546).

The spelling of 1321123315 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, three hundred fifteen".