111121221122 has 4 divisors (see below), whose sum is σ = 166681831686. Its totient is φ = 55560610560.

The previous prime is 111121221007. The next prime is 111121221161. The reversal of 111121221122 is 221122121111.

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

It can be written as a sum of positive squares in only one way, i.e., 110749849681 + 371371441 = 332791^2 + 19271^2 .

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 111121221122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780305279 + ... + 27780305282.

Almost surely, 2^111121221122 is an apocalyptic number.

111121221122 is a deficient number, since it is larger than the sum of its proper divisors (55560610564).

111121221122 is an equidigital number, since it uses as much as digits as its factorization.

111121221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55560610563.

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

Adding to 111121221122 its reverse (221122121111), we get a palindrome (332243342233).

The spelling of 111121221122 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".