111221011102 has 4 divisors (see below), whose sum is σ = 166831516656. Its totient is φ = 55610505550.

The previous prime is 111221011049. The next prime is 111221011127. The reversal of 111221011102 is 201110122111.

It is a happy number.

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

It is a super-2 number, since 2×111221011102² (a number of 23 digits) contains 22 as substring.

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, 27805252774 + ... + 27805252777.

It is an arithmetic number, because the mean of its divisors is an integer number (41707879164).

Almost surely, 2^111221011102 is an apocalyptic number.

111221011102 is a deficient number, since it is larger than the sum of its proper divisors (55610505554).

111221011102 is an equidigital number, since it uses as much as digits as its factorization.

111221011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55610505553.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111221011102 its reverse (201110122111), we get a palindrome (312331133213).

The spelling of 111221011102 in words is "one hundred eleven billion, two hundred twenty-one million, eleven thousand, one hundred two".