111220121212 has 24 divisors (see below), whose sum is σ = 203619780000. Its totient is φ = 53055473856.

The previous prime is 111220121087. The next prime is 111220121227. The reversal of 111220121212 is 212121022111.

111220121212 is a modest number, since divided by 121212 gives 111220 as remainder.

It is a congruent 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, 1518087 + ... + 1589662.

It is an arithmetic number, because the mean of its divisors is an integer number (8484157500).

Almost surely, 2^111220121212 is an apocalyptic number.

It is an amenable number.

111220121212 is a deficient number, since it is larger than the sum of its proper divisors (92399658788).

111220121212 is a wasteful number, since it uses less digits than its factorization.

111220121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108165 (or 3108163 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220121212 its reverse (212121022111), we get a palindrome (323341143323).

The spelling of 111220121212 in words is "one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".