212200110222221 has 4 divisors (see below), whose sum is σ = 231491029333344. Its totient is φ = 192909191111100.

The previous prime is 212200110222209. The next prime is 212200110222307. The reversal of 212200110222221 is 122222011002212.

212200110222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212200110222221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212200110222193 and 212200110222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200110422221) 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, 9645459555545 + ... + 9645459555566.

It is an arithmetic number, because the mean of its divisors is an integer number (57872757333336).

Almost surely, 2^{212200110222221} is an apocalyptic number.

It is an amenable number.

212200110222221 is a deficient number, since it is larger than the sum of its proper divisors (19290919111123).

212200110222221 is a wasteful number, since it uses less digits than its factorization.

212200110222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19290919111122.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212200110222221 its reverse (122222011002212), we get a palindrome (334422121224433).

The spelling of 212200110222221 in words is "two hundred twelve trillion, two hundred billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".