20021122200 has 96 divisors (see below), whose sum is σ = 62163498960. Its totient is φ = 5330534400.

The previous prime is 20021122189. The next prime is 20021122217. The reversal of 20021122200 is 222112002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358572 + ... + 410628.

Almost surely, 2^20021122200 is an apocalyptic number.

20021122200 is a gapful number since it is divisible by the number (20) 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 20021122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31081749480).

20021122200 is an abundant number, since it is smaller than the sum of its proper divisors (42142376760).

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

20021122200 is a wasteful number, since it uses less digits than its factorization.

20021122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52717 (or 52708 counting only the distinct ones).

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

Adding to 20021122200 its reverse (222112002), we get a palindrome (20243234202).

The spelling of 20021122200 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, two hundred".