20211222200 has 96 divisors (see below), whose sum is σ = 50772635760. Its totient is φ = 7438003200.

The previous prime is 20211222173. The next prime is 20211222217. The reversal of 20211222200 is 222211202.

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, 785540 + ... + 810860.

Almost surely, 2^20211222200 is an apocalyptic number.

20211222200 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 20211222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25386317880).

20211222200 is an abundant number, since it is smaller than the sum of its proper divisors (30561413560).

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

20211222200 is a wasteful number, since it uses less digits than its factorization.

20211222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25657 (or 25648 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20211222200 its reverse (222211202), we get a palindrome (20433433402).

It can be divided in two parts, 2021 and 1222200, that added together give a palindrome (1224221).

The spelling of 20211222200 in words is "twenty billion, two hundred eleven million, two hundred twenty-two thousand, two hundred".