1320221004 has 48 divisors (see below), whose sum is σ = 3246055680. Its totient is φ = 416473920.

The previous prime is 1320220981. The next prime is 1320221011. The reversal of 1320221004 is 4001220231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266817 + ... + 271719.

It is an arithmetic number, because the mean of its divisors is an integer number (67626160).

Almost surely, 2^1320221004 is an apocalyptic number.

It is an amenable number.

1320221004 is an abundant number, since it is smaller than the sum of its proper divisors (1925834676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320221004 is a wasteful number, since it uses less digits than its factorization.

1320221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110 (or 6108 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1320221004 is about 36334.8455893238. The cubic root of 1320221004 is about 1097.0225274837.

Adding to 1320221004 its reverse (4001220231), we get a palindrome (5321441235).

The spelling of 1320221004 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, four".