1320022331 has 4 divisors (see below), whose sum is σ = 1320331032. Its totient is φ = 1319713632.

The previous prime is 1320022313. The next prime is 1320022357. The reversal of 1320022331 is 1332200231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320022331 - 2¹⁸ = 1319760187 is a prime.

It is a super-2 number, since 2×1320022331² = 3484917908677347122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320022381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147845 + ... + 156518.

It is an arithmetic number, because the mean of its divisors is an integer number (330082758).

Almost surely, 2^1320022331 is an apocalyptic number.

1320022331 is a deficient number, since it is larger than the sum of its proper divisors (308701).

1320022331 is an equidigital number, since it uses as much as digits as its factorization.

1320022331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308700.

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

The square root of 1320022331 is about 36332.1115681431. Note that the first 3 decimals coincide. The cubic root of 1320022331 is about 1096.9674963716.

Adding to 1320022331 its reverse (1332200231), we get a palindrome (2652222562).

The spelling of 1320022331 in words is "one billion, three hundred twenty million, twenty-two thousand, three hundred thirty-one".