200121002220 has 96 divisors (see below), whose sum is σ = 619095633408. Its totient is φ = 48042683392.

The previous prime is 200121002189. The next prime is 200121002311. The reversal of 200121002220 is 22200121002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 200121002196 and 200121002205.

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, 4241694 + ... + 4288613.

It is an arithmetic number, because the mean of its divisors is an integer number (6448912848).

Almost surely, 2^200121002220 is an apocalyptic number.

200121002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121002220 is an abundant number, since it is smaller than the sum of its proper divisors (418974631188).

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

200121002220 is a wasteful number, since it uses less digits than its factorization.

200121002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530359 (or 8530357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 200121002220 its reverse (22200121002), we get a palindrome (222321123222).

The spelling of 200121002220 in words is "two hundred billion, one hundred twenty-one million, two thousand, two hundred twenty".