221212021101222 has 16 divisors (see below), whose sum is σ = 454381448748912. Its totient is φ = 71744439276000.

The previous prime is 221212021101191. The next prime is 221212021101293. The reversal of 221212021101222 is 222101120212122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498225272529 + ... + 498225272972.

It is an arithmetic number, because the mean of its divisors is an integer number (28398840546807).

Almost surely, 2^{221212021101222} is an apocalyptic number.

221212021101222 is an abundant number, since it is smaller than the sum of its proper divisors (233169427647690).

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

221212021101222 is a wasteful number, since it uses less digits than its factorization.

221212021101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996450545543.

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

Adding to 221212021101222 its reverse (222101120212122), we get a palindrome (443313141313344).

The spelling of 221212021101222 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred one thousand, two hundred twenty-two".