221100110222122 has 4 divisors (see below), whose sum is σ = 331650165333186. Its totient is φ = 110550055111060.

The previous prime is 221100110222111. The next prime is 221100110222137. The reversal of 221100110222122 is 221222011001122.

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

It can be written as a sum of positive squares in only one way, i.e., 217617934030641 + 3482176191481 = 14751879^2 + 1866059^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221100110222122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275027555529 + ... + 55275027555532.

Almost surely, 2^{221100110222122} is an apocalyptic number.

221100110222122 is a deficient number, since it is larger than the sum of its proper divisors (110550055111064).

221100110222122 is a wasteful number, since it uses less digits than its factorization.

221100110222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110550055111063.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221100110222122 its reverse (221222011001122), we get a palindrome (442322121223244).

The spelling of 221100110222122 in words is "two hundred twenty-one trillion, one hundred billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-two".