1320121233 has 20 divisors (see below), whose sum is σ = 1991191488. Its totient is φ = 871530840.

The previous prime is 1320121223. The next prime is 1320121237. The reversal of 1320121233 is 3321210231.

It is not a de Polignac number, because 1320121233 - 2¹² = 1320117137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320121237) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70773 + ... + 87458.

Almost surely, 2^1320121233 is an apocalyptic number.

It is an amenable number.

1320121233 is a deficient number, since it is larger than the sum of its proper divisors (671070255).

1320121233 is a wasteful number, since it uses less digits than its factorization.

1320121233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158346 (or 158337 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1320121233 is about 36333.4726251153. The cubic root of 1320121233 is about 1096.9948922642.

Adding to 1320121233 its reverse (3321210231), we get a palindrome (4641331464).

The spelling of 1320121233 in words is "one billion, three hundred twenty million, one hundred twenty-one thousand, two hundred thirty-three".