221011111111222 has 4 divisors (see below), whose sum is σ = 331516666666836. Its totient is φ = 110505555555610.

The previous prime is 221011111111207. The next prime is 221011111111229. The reversal of 221011111111222 is 222111111110122.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×221011111111222² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221011111111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011111111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55252777777804 + ... + 55252777777807.

It is an arithmetic number, because the mean of its divisors is an integer number (82879166666709).

Almost surely, 2^{221011111111222} is an apocalyptic number.

221011111111222 is a deficient number, since it is larger than the sum of its proper divisors (110505555555614).

221011111111222 is a wasteful number, since it uses less digits than its factorization.

221011111111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110505555555613.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 221011111111222 its reverse (222111111110122), we get a palindrome (443122222221344).

The spelling of 221011111111222 in words is "two hundred twenty-one trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-two".