111221123210 has 16 divisors (see below), whose sum is σ = 200258618976. Its totient is φ = 44474983248.

The previous prime is 111221123191. The next prime is 111221123249. The reversal of 111221123210 is 12321122111.

It is a happy 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, 1648532 + ... + 1714671.

It is an arithmetic number, because the mean of its divisors is an integer number (12516163686).

Almost surely, 2^111221123210 is an apocalyptic number.

111221123210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221123210 is a deficient number, since it is larger than the sum of its proper divisors (89037495766).

111221123210 is a wasteful number, since it uses less digits than its factorization.

111221123210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366517.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111221123210 its reverse (12321122111), we get a palindrome (123542245321).

The spelling of 111221123210 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred ten".