111222222201 has 64 divisors (see below), whose sum is σ = 169743974400. Its totient is φ = 71936932032.

The previous prime is 111222222197. The next prime is 111222222217. The reversal of 111222222201 is 102222222111.

It is a happy number.

It is not a de Polignac number, because 111222222201 - 2² = 111222222197 is a prime.

It is a super-2 number, since 2×111222222201² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111222222701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 172973586 + ... + 172974228.

It is an arithmetic number, because the mean of its divisors is an integer number (2652249600).

Almost surely, 2^111222222201 is an apocalyptic number.

It is an amenable number.

111222222201 is a deficient number, since it is larger than the sum of its proper divisors (58521752199).

111222222201 is a wasteful number, since it uses less digits than its factorization.

111222222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1461 counting only the distinct ones).

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

Adding to 111222222201 its reverse (102222222111), we get a palindrome (213444444312).

The spelling of 111222222201 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred one".