221200121211222 has 64 divisors (see below), whose sum is σ = 445891767552000. Its totient is φ = 73152206265600.

The previous prime is 221200121211151. The next prime is 221200121211227. The reversal of 221200121211222 is 222112121002122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200121211227) 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, 8405204808 + ... + 8405231124.

It is an arithmetic number, because the mean of its divisors is an integer number (6967058868000).

Almost surely, 2^{221200121211222} is an apocalyptic number.

221200121211222 is an abundant number, since it is smaller than the sum of its proper divisors (224691646340778).

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

221200121211222 is a wasteful number, since it uses less digits than its factorization.

221200121211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33061.

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

Adding to 221200121211222 its reverse (222112121002122), we get a palindrome (443312242213344).

The spelling of 221200121211222 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".