111220121110 has 96 divisors (see below), whose sum is σ = 241094568960. Its totient is φ = 36789758208.

The previous prime is 111220121087. The next prime is 111220121227. The reversal of 111220121110 is 11121022111.

It is a happy number.

It is a super-3 number, since 3×111220121110³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28034347 + ... + 28038313.

It is an arithmetic number, because the mean of its divisors is an integer number (2511401760).

Almost surely, 2^111220121110 is an apocalyptic number.

111220121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111220121110 is an abundant number, since it is smaller than the sum of its proper divisors (129874447850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111220121110 is a wasteful number, since it uses less digits than its factorization.

111220121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990 (or 5983 counting only the distinct ones).

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

Adding to 111220121110 its reverse (11121022111), we get a palindrome (122341143221).

It can be divided in two parts, 1112201 and 21110, that added together give a palindrome (1133311).

The spelling of 111220121110 in words is "one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, one hundred ten".