1321333123 has 8 divisors (see below), whose sum is σ = 1449420336. Its totient is φ = 1194573600.

The previous prime is 1321333121. The next prime is 1321333129. The reversal of 1321333123 is 3213331231.

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

It is not a de Polignac number, because 1321333123 - 2¹ = 1321333121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321333094 and 1321333103.

It is not an unprimeable number, because it can be changed into a prime (1321333121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329836 + ... + 333817.

It is an arithmetic number, because the mean of its divisors is an integer number (181177542).

Almost surely, 2^1321333123 is an apocalyptic number.

1321333123 is a deficient number, since it is larger than the sum of its proper divisors (128087213).

1321333123 is a wasteful number, since it uses less digits than its factorization.

1321333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663845.

The product of its digits is 972, while the sum is 22.

The square root of 1321333123 is about 36350.1461207517. The cubic root of 1321333123 is about 1097.3304752142.

Adding to 1321333123 its reverse (3213331231), we get a palindrome (4534664354).

The spelling of 1321333123 in words is "one billion, three hundred twenty-one million, three hundred thirty-three thousand, one hundred twenty-three".