111312211222 has 4 divisors (see below), whose sum is σ = 166968316836. Its totient is φ = 55656105610.

The previous prime is 111312211207. The next prime is 111312211237. The reversal of 111312211222 is 222112213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222112213111 = 197 ⋅1127473163.

It is an interprime number because it is at equal distance from previous prime (111312211207) and next prime (111312211237).

It is a super-2 number, since 2×111312211222² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111312211222.

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, 27828052804 + ... + 27828052807.

It is an arithmetic number, because the mean of its divisors is an integer number (41742079209).

Almost surely, 2^111312211222 is an apocalyptic number.

111312211222 is a deficient number, since it is larger than the sum of its proper divisors (55656105614).

111312211222 is an equidigital number, since it uses as much as digits as its factorization.

111312211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55656105613.

The product of its digits is 96, while the sum is 19.

Adding to 111312211222 its reverse (222112213111), we get a palindrome (333424424333).

The spelling of 111312211222 in words is "one hundred eleven billion, three hundred twelve million, two hundred eleven thousand, two hundred twenty-two".