1321120033 has 4 divisors (see below), whose sum is σ = 1323973888. Its totient is φ = 1318266180.

The previous prime is 1321120013. The next prime is 1321120043. The reversal of 1321120033 is 3300211231.

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 an emirpimes, since its reverse is a distinct semiprime: 3300211231 = 977 ⋅3377903.

It is a cyclic number.

It is not a de Polignac number, because 1321120033 - 2⁵ = 1321120001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321119989 and 1321120016.

It is not an unprimeable number, because it can be changed into a prime (1321120013) 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, 1426233 + ... + 1427158.

It is an arithmetic number, because the mean of its divisors is an integer number (330993472).

Almost surely, 2^1321120033 is an apocalyptic number.

It is an amenable number.

1321120033 is a deficient number, since it is larger than the sum of its proper divisors (2853855).

1321120033 is an equidigital number, since it uses as much as digits as its factorization.

1321120033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853854.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321120033 is about 36347.2149276943. The cubic root of 1321120033 is about 1097.2714835999.

Adding to 1321120033 its reverse (3300211231), we get a palindrome (4621331264).

The spelling of 1321120033 in words is "one billion, three hundred twenty-one million, one hundred twenty thousand, thirty-three".