1320221042 has 24 divisors (see below), whose sum is σ = 2388632256. Its totient is φ = 536027544.

The previous prime is 1320221041. The next prime is 1320221047. The reversal of 1320221042 is 2401220231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320221042.

It is not an unprimeable number, because it can be changed into a prime (1320221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125558 + ... + 135665.

It is an arithmetic number, because the mean of its divisors is an integer number (99526344).

Almost surely, 2^1320221042 is an apocalyptic number.

1320221042 is a deficient number, since it is larger than the sum of its proper divisors (1068411214).

1320221042 is a wasteful number, since it uses less digits than its factorization.

1320221042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261270 (or 261251 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1320221042 is about 36334.8461122378. The cubic root of 1320221042 is about 1097.0225380089.

Adding to 1320221042 its reverse (2401220231), we get a palindrome (3721441273).

The spelling of 1320221042 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, forty-two".