1220320133 has 4 divisors (see below), whose sum is σ = 1220422848. Its totient is φ = 1220217420.

The previous prime is 1220320121. The next prime is 1220320147. The reversal of 1220320133 is 3310230221.

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.

It is a cyclic number.

It is not a de Polignac number, because 1220320133 - 2⁴ = 1220320117 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 (1220320103) 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, 30791 + ... + 58212.

It is an arithmetic number, because the mean of its divisors is an integer number (305105712).

Almost surely, 2^1220320133 is an apocalyptic number.

It is an amenable number.

1220320133 is a deficient number, since it is larger than the sum of its proper divisors (102715).

1220320133 is an equidigital number, since it uses as much as digits as its factorization.

1220320133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102714.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1220320133 is about 34933.0807831202. The cubic root of 1220320133 is about 1068.6231841686.

Adding to 1220320133 its reverse (3310230221), we get a palindrome (4530550354).

The spelling of 1220320133 in words is "one billion, two hundred twenty million, three hundred twenty thousand, one hundred thirty-three".