111221111121010 has 32 divisors (see below), whose sum is σ = 220560172858944. Its totient is φ = 40043604360000.

The previous prime is 111221111120993. The next prime is 111221111121049. The reversal of 111221111121010 is 10121111122111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5005439436 + ... + 5005461655.

It is an arithmetic number, because the mean of its divisors is an integer number (6892505401842).

Almost surely, 2^{111221111121010} is an apocalyptic number.

111221111121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221111121010 is a deficient number, since it is larger than the sum of its proper divisors (109339061737934).

111221111121010 is a wasteful number, since it uses less digits than its factorization.

111221111121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010901210.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111221111121010 its reverse (10121111122111), we get a palindrome (121342222243121).

It can be divided in two parts, 1112211 and 11121010, that added together give a palindrome (12233221).

The spelling of 111221111121010 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, ten".