1321332123 has 16 divisors (see below), whose sum is σ = 1915829280. Its totient is φ = 806662656.

The previous prime is 1321332119. The next prime is 1321332151. The reversal of 1321332123 is 3212331231.

It is not a de Polignac number, because 1321332123 - 2² = 1321332119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321332123.

It is not an unprimeable number, because it can be changed into a prime (1321330123) 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, 348228 + ... + 352001.

It is an arithmetic number, because the mean of its divisors is an integer number (119739330).

Almost surely, 2^1321332123 is an apocalyptic number.

1321332123 is a deficient number, since it is larger than the sum of its proper divisors (594497157).

1321332123 is a wasteful number, since it uses less digits than its factorization.

1321332123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700286.

The product of its digits is 648, while the sum is 21.

The square root of 1321332123 is about 36350.1323656462. The cubic root of 1321332123 is about 1097.3301983900.

Adding to 1321332123 its reverse (3212331231), we get a palindrome (4533663354).

The spelling of 1321332123 in words is "one billion, three hundred twenty-one million, three hundred thirty-two thousand, one hundred twenty-three".