20221212200 has 72 divisors (see below), whose sum is σ = 54690151950. Its totient is φ = 6932983680.

The previous prime is 20221212199. The next prime is 20221212227. The reversal of 20221212200 is 221212202.

It can be written as a sum of positive squares in 3 ways, for example, as 13675431364 + 6545780836 = 116942^2 + 80906^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1021895 + ... + 1041494.

Almost surely, 2^20221212200 is an apocalyptic number.

20221212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221212200 is an abundant number, since it is smaller than the sum of its proper divisors (34468939750).

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

20221212200 is a wasteful number, since it uses less digits than its factorization.

20221212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063419 (or 2063403 counting only the distinct ones).

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

Adding to 20221212200 its reverse (221212202), we get a palindrome (20442424402).

It can be divided in two parts, 202212 and 12200, that added together give a palindrome (214412).

The spelling of 20221212200 in words is "twenty billion, two hundred twenty-one million, two hundred twelve thousand, two hundred".