1321032200220 has 144 divisors (see below), whose sum is σ = 4019028424320. Its totient is φ = 351230266368.

The previous prime is 1321032200207. The next prime is 1321032200221. The reversal of 1321032200220 is 220022301231.

1321032200220 is a `hidden beast` number, since 1 + 3 + 210 + 32 + 200 + 220 = 666.

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 = 1321032200193 and 1321032200202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321032200221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197077389 + ... + 197084091.

Almost surely, 2^{1321032200220} is an apocalyptic number.

1321032200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321032200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009514212160).

1321032200220 is an abundant number, since it is smaller than the sum of its proper divisors (2697996224100).

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

1321032200220 is a wasteful number, since it uses less digits than its factorization.

1321032200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804 (or 9799 counting only the distinct ones).

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

Adding to 1321032200220 its reverse (220022301231), we get a palindrome (1541054501451).

The spelling of 1321032200220 in words is "one trillion, three hundred twenty-one billion, thirty-two million, two hundred thousand, two hundred twenty".