1032320021220 has 72 divisors (see below), whose sum is σ = 3247347440064. Its totient is φ = 275285337696.

The previous prime is 1032320021203. The next prime is 1032320021221. The reversal of 1032320021220 is 221200232301.

1032320021220 is a `hidden beast` number, since 103 + 2 + 320 + 0 + 21 + 220 = 666.

It is a super-2 number, since 2×1032320021220² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1032320021193 and 1032320021202.

It is not an unprimeable number, because it can be changed into a prime (1032320021221) 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 23 ways as a sum of consecutive naturals, for example, 106200904 + ... + 106210623.

Almost surely, 2^{1032320021220} is an apocalyptic number.

1032320021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1032320021220 is an abundant number, since it is smaller than the sum of its proper divisors (2215027418844).

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

1032320021220 is a wasteful number, since it uses less digits than its factorization.

1032320021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212411551 (or 212411537 counting only the distinct ones).

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

Adding to 1032320021220 its reverse (221200232301), we get a palindrome (1253520253521).

The spelling of 1032320021220 in words is "one trillion, thirty-two billion, three hundred twenty million, twenty-one thousand, two hundred twenty".