1000200021220 has 24 divisors (see below), whose sum is σ = 2210968468800. Its totient is φ = 379023165792.

The previous prime is 1000200021217. The next prime is 1000200021221. The reversal of 1000200021220 is 221200020001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1000200021197 and 1000200021206.

It is not an unprimeable number, because it can be changed into a prime (1000200021221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316052280 + ... + 1316053039.

It is an arithmetic number, because the mean of its divisors is an integer number (92123686200).

Almost surely, 2^{1000200021220} is an apocalyptic number.

1000200021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000200021220 is an abundant number, since it is smaller than the sum of its proper divisors (1210768447580).

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

1000200021220 is a wasteful number, since it uses less digits than its factorization.

1000200021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632105347 (or 2632105345 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1000200021220 its reverse (221200020001), we get a palindrome (1221400041221).

The spelling of 1000200021220 in words is "one trillion, two hundred million, twenty-one thousand, two hundred twenty".