111211211222 has 4 divisors (see below), whose sum is σ = 166816816836. Its totient is φ = 55605605610.

The previous prime is 111211211143. The next prime is 111211211231. The reversal of 111211211222 is 222112112111.

It is a semiprime because it is the product of two primes.

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

It is a self number, because there is not a number n which added to its sum of digits gives 111211211222.

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, 27802802804 + ... + 27802802807.

It is an arithmetic number, because the mean of its divisors is an integer number (41704204209).

Almost surely, 2^111211211222 is an apocalyptic number.

111211211222 is a deficient number, since it is larger than the sum of its proper divisors (55605605614).

111211211222 is an equidigital number, since it uses as much as digits as its factorization.

111211211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55605605613.

The product of its digits is 32, while the sum is 17.

Adding to 111211211222 its reverse (222112112111), we get a palindrome (333323323333).

The spelling of 111211211222 in words is "one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".