111212211112222 has 16 divisors (see below), whose sum is σ = 182508066663552. Its totient is φ = 50405324917720.

The previous prime is 111212211112153. The next prime is 111212211112241. The reversal of 111212211112222 is 222211112212111.

It is a Harshad number since it is a multiple of its sum of digits (22).

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

It is a junction number, because it is equal to n+sod(n) for n = 111212211112193 and 111212211112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7283998858 + ... + 7284014125.

It is an arithmetic number, because the mean of its divisors is an integer number (11406754166472).

Almost surely, 2^{111212211112222} is an apocalyptic number.

111212211112222 is a deficient number, since it is larger than the sum of its proper divisors (71295855551330).

111212211112222 is a wasteful number, since it uses less digits than its factorization.

111212211112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14568013343.

The product of its digits is 128, while the sum is 22.

Adding to 111212211112222 its reverse (222211112212111), we get a palindrome (333423323324333).

The spelling of 111212211112222 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty-two".