221122012222 has 4 divisors (see below), whose sum is σ = 331683018336. Its totient is φ = 110561006110.

The previous prime is 221122012183. The next prime is 221122012261. The reversal of 221122012222 is 222210221122.

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

It is an interprime number because it is at equal distance from previous prime (221122012183) and next prime (221122012261).

It is a self number, because there is not a number n which added to its sum of digits gives 221122012222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280503054 + ... + 55280503057.

It is an arithmetic number, because the mean of its divisors is an integer number (82920754584).

Almost surely, 2^221122012222 is an apocalyptic number.

221122012222 is a deficient number, since it is larger than the sum of its proper divisors (110561006114).

221122012222 is a wasteful number, since it uses less digits than its factorization.

221122012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110561006113.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221122012222 its reverse (222210221122), we get a palindrome (443332233344).

The spelling of 221122012222 in words is "two hundred twenty-one billion, one hundred twenty-two million, twelve thousand, two hundred twenty-two".