111220222222 has 4 divisors (see below), whose sum is σ = 166830333336. Its totient is φ = 55610111110.

The previous prime is 111220222177. The next prime is 111220222259. The reversal of 111220222222 is 222222022111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222222022111 = 27541 ⋅8068771.

It is a super-2 number, since 2×111220222222² (a number of 23 digits) contains 22 as substring.

111220222222 is a modest number, since divided by 222222 gives 111220 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 111220222222.

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, 27805055554 + ... + 27805055557.

It is an arithmetic number, because the mean of its divisors is an integer number (41707583334).

Almost surely, 2^111220222222 is an apocalyptic number.

111220222222 is a deficient number, since it is larger than the sum of its proper divisors (55610111114).

111220222222 is an equidigital number, since it uses as much as digits as its factorization.

111220222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55610111113.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 111220222222 its reverse (222222022111), we get a palindrome (333442244333).

The spelling of 111220222222 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-two".