1323031121 has 4 divisors (see below), whose sum is σ = 1323125232. Its totient is φ = 1322937012.

The previous prime is 1323031109. The next prime is 1323031133. The reversal of 1323031121 is 1211303231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1211303231 = 6203 ⋅195277.

It is an interprime number because it is at equal distance from previous prime (1323031109) and next prime (1323031133).

It is a cyclic number.

It is not a de Polignac number, because 1323031121 - 2³⁰ = 249289297 is a prime.

It is a super-2 number, since 2×1323031121² = 3500822694269033282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323031121.

It is not an unprimeable number, because it can be changed into a prime (1323031141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21251 + ... + 55656.

It is an arithmetic number, because the mean of its divisors is an integer number (330781308).

Almost surely, 2^1323031121 is an apocalyptic number.

It is an amenable number.

1323031121 is a deficient number, since it is larger than the sum of its proper divisors (94111).

1323031121 is an equidigital number, since it uses as much as digits as its factorization.

1323031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94110.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1323031121 is about 36373.4947592337. The cubic root of 1323031121 is about 1097.8003207439.

Adding to 1323031121 its reverse (1211303231), we get a palindrome (2534334352).

The spelling of 1323031121 in words is "one billion, three hundred twenty-three million, thirty-one thousand, one hundred twenty-one".