1320032021004 has 96 divisors (see below), whose sum is σ = 3625914378240. Its totient is φ = 413865172224.

The previous prime is 1320032020981. The next prime is 1320032021027. The reversal of 1320032021004 is 4001202300231.

1320032021004 is a `hidden beast` number, since 1 + 320 + 0 + 320 + 21 + 0 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1320032020981) and next prime (1320032021027).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2679297 + ... + 3133479.

It is an arithmetic number, because the mean of its divisors is an integer number (37769941440).

Almost surely, 2^{1320032021004} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320032021004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812957189120).

1320032021004 is an abundant number, since it is smaller than the sum of its proper divisors (2305882357236).

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

1320032021004 is a wasteful number, since it uses less digits than its factorization.

1320032021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455796 (or 455788 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1320032021004 its reverse (4001202300231), we get a palindrome (5321234321235).

The spelling of 1320032021004 in words is "one trillion, three hundred twenty billion, thirty-two million, twenty-one thousand, four".