201221021121222 has 16 divisors (see below), whose sum is σ = 403001766927360. Its totient is φ = 66980386259592.

The previous prime is 201221021121221. The next prime is 201221021121233. The reversal of 201221021121222 is 222121120122102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221021121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23321857198 + ... + 23321865825.

It is an arithmetic number, because the mean of its divisors is an integer number (25187610432960).

Almost surely, 2^{201221021121222} is an apocalyptic number.

201221021121222 is an abundant number, since it is smaller than the sum of its proper divisors (201780745806138).

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

201221021121222 is a wasteful number, since it uses less digits than its factorization.

201221021121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46643723747.

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

Adding to 201221021121222 its reverse (222121120122102), we get a palindrome (423342141243324).

The spelling of 201221021121222 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".