1220321133 has 20 divisors (see below), whose sum is σ = 1832133600. Its totient is φ = 809448552.

The previous prime is 1220321101. The next prime is 1220321177. The reversal of 1220321133 is 3311230221.

It is not a de Polignac number, because 1220321133 - 2⁵ = 1220321101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220321033) 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, 21735 + ... + 53972.

It is an arithmetic number, because the mean of its divisors is an integer number (91606680).

Almost surely, 2^1220321133 is an apocalyptic number.

It is an amenable number.

1220321133 is a deficient number, since it is larger than the sum of its proper divisors (611812467).

1220321133 is an equidigital number, since it uses as much as digits as its factorization.

1220321133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75918 (or 75909 counting only the distinct ones).

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

The square root of 1220321133 is about 34933.0950961978. The cubic root of 1220321133 is about 1068.6234760655.

Adding to 1220321133 its reverse (3311230221), we get a palindrome (4531551354).

The spelling of 1220321133 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred thirty-three".