221222111106 has 16 divisors (see below), whose sum is σ = 442460270304. Its totient is φ = 73738029024.

The previous prime is 221222111101. The next prime is 221222111107. The reversal of 221222111106 is 601111222122.

It is not an unprimeable number, because it can be changed into a prime (221222111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485611 + ... + 823566.

It is an arithmetic number, because the mean of its divisors is an integer number (27653766894).

Almost surely, 2^221222111106 is an apocalyptic number.

221222111106 is an abundant number, since it is smaller than the sum of its proper divisors (221238159198).

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

221222111106 is a wasteful number, since it uses less digits than its factorization.

221222111106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337345.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 221222111106 its reverse (601111222122), we get a palindrome (822333333228).

The spelling of 221222111106 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred six".