1323121133 has 4 divisors (see below), whose sum is σ = 1326279360. Its totient is φ = 1319962908.

The previous prime is 1323121099. The next prime is 1323121157. The reversal of 1323121133 is 3311213231.

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: 3311213231 = 67 ⋅49421093.

It is a cyclic number.

It is not a de Polignac number, because 1323121133 - 2³⁰ = 249379309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323121193) 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, 1578485 + ... + 1579322.

It is an arithmetic number, because the mean of its divisors is an integer number (331569840).

Almost surely, 2^1323121133 is an apocalyptic number.

It is an amenable number.

1323121133 is a deficient number, since it is larger than the sum of its proper divisors (3158227).

1323121133 is an equidigital number, since it uses as much as digits as its factorization.

1323121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158226.

The product of its digits is 324, while the sum is 20.

The square root of 1323121133 is about 36374.7320677417. The cubic root of 1323121133 is about 1097.8252163441.

Adding to 1323121133 its reverse (3311213231), we get a palindrome (4634334364).

The spelling of 1323121133 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred thirty-three".