212721804222 has 8 divisors (see below), whose sum is σ = 425443608456. Its totient is φ = 70907268072.

The previous prime is 212721804209. The next prime is 212721804223. The reversal of 212721804222 is 222408127212.

It is a sphenic number, since it is the product of 3 distinct primes.

212721804222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212721804223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17726817013 + ... + 17726817024.

It is an arithmetic number, because the mean of its divisors is an integer number (53180451057).

Almost surely, 2^212721804222 is an apocalyptic number.

212721804222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212721804222 is a wasteful number, since it uses less digits than its factorization.

212721804222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35453634042.

The product of its (nonzero) digits is 14336, while the sum is 33.

The spelling of 212721804222 in words is "two hundred twelve billion, seven hundred twenty-one million, eight hundred four thousand, two hundred twenty-two".