221121021112222 has 32 divisors (see below), whose sum is σ = 413662823103744. Its totient is φ = 86122339560000.

The previous prime is 221121021112193. The next prime is 221121021112223. The reversal of 221121021112222 is 222211120121122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221121021112193 and 221121021112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121021112223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238766568 + ... + 239690875.

It is an arithmetic number, because the mean of its divisors is an integer number (12926963221992).

Almost surely, 2^{221121021112222} is an apocalyptic number.

221121021112222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221121021112222 is a deficient number, since it is larger than the sum of its proper divisors (192541801991522).

221121021112222 is a wasteful number, since it uses less digits than its factorization.

221121021112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478460464.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221121021112222 its reverse (222211120121122), we get a palindrome (443332141233344).

The spelling of 221121021112222 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, two hundred twenty-two".