221112222201 has 40 divisors (see below), whose sum is σ = 374433086720. Its totient is φ = 128907518688.

The previous prime is 221112222187. The next prime is 221112222203. The reversal of 221112222201 is 102222211122.

It is a happy number.

221112222201 is a `hidden beast` number, since 221 + 1 + 1 + 222 + 220 + 1 = 666.

It is not a de Polignac number, because 221112222201 - 2¹³ = 221112214009 is a prime.

It is a super-2 number, since 2×221112222201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112222203) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5505865 + ... + 5545878.

It is an arithmetic number, because the mean of its divisors is an integer number (9360827168).

Almost surely, 2^221112222201 is an apocalyptic number.

It is an amenable number.

221112222201 is a deficient number, since it is larger than the sum of its proper divisors (153320864519).

221112222201 is a wasteful number, since it uses less digits than its factorization.

221112222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051787 (or 11051778 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221112222201 its reverse (102222211122), we get a palindrome (323334433323).

The spelling of 221112222201 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, two hundred one".