212222200400 has 60 divisors (see below), whose sum is σ = 582701535072. Its totient is φ = 72761896320.

The previous prime is 212222200391. The next prime is 212222200403. The reversal of 212222200400 is 4002222212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222200403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37894022 + ... + 37899621.

Almost surely, 2^212222200400 is an apocalyptic number.

212222200400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222200400 is an abundant number, since it is smaller than the sum of its proper divisors (370479334672).

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

212222200400 is a wasteful number, since it uses less digits than its factorization.

212222200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75793668 (or 75793657 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 212222200400 its reverse (4002222212), we get a palindrome (216224422612).

The spelling of 212222200400 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred thousand, four hundred".