212122200112221 has 32 divisors (see below), whose sum is σ = 323357435670528. Its totient is φ = 121166342110080.

The previous prime is 212122200112099. The next prime is 212122200112297. The reversal of 212122200112221 is 122211002221212.

212122200112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212122200112221 - 2³⁷ = 211984761158749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122200112021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 586662736 + ... + 587024198.

It is an arithmetic number, because the mean of its divisors is an integer number (10104919864704).

Almost surely, 2^{212122200112221} is an apocalyptic number.

212122200112221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212122200112221 is a deficient number, since it is larger than the sum of its proper divisors (111235235558307).

212122200112221 is a wasteful number, since it uses less digits than its factorization.

212122200112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372081.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212122200112221 its reverse (122211002221212), we get a palindrome (334333202333433).

The spelling of 212122200112221 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".