111121211222222 has 4 divisors (see below), whose sum is σ = 166681816833336. Its totient is φ = 55560605611110.

The previous prime is 111121211222179. The next prime is 111121211222267. The reversal of 111121211222222 is 222222112121111.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780302805554 + ... + 27780302805557.

It is an arithmetic number, because the mean of its divisors is an integer number (41670454208334).

Almost surely, 2^{111121211222222} is an apocalyptic number.

111121211222222 is a deficient number, since it is larger than the sum of its proper divisors (55560605611114).

111121211222222 is an equidigital number, since it uses as much as digits as its factorization.

111121211222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560605611113.

The product of its digits is 256, while the sum is 23.

Adding to 111121211222222 its reverse (222222112121111), we get a palindrome (333343323343333).

The spelling of 111121211222222 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".