111121222 has 4 divisors (see below), whose sum is σ = 166681836. Its totient is φ = 55560610.

The previous prime is 111121201. The next prime is 111121229. The reversal of 111121222 is 222121111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222121111 = 131 ⋅1695581.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780304 + ... + 27780307.

It is an arithmetic number, because the mean of its divisors is an integer number (41670459).

Almost surely, 2^111121222 is an apocalyptic number.

111121222 is a deficient number, since it is larger than the sum of its proper divisors (55560614).

111121222 is an equidigital number, since it uses as much as digits as its factorization.

111121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55560613.

The product of its digits is 16, while the sum is 13.

The square root of 111121222 is about 10541.4051245553. The cubic root of 111121222 is about 480.7644387520.

Adding to 111121222 its reverse (222121111), we get a palindrome (333242333).

The spelling of 111121222 in words is "one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-two".