111221201212 has 48 divisors (see below), whose sum is σ = 214536722400. Its totient is φ = 50030496000.

The previous prime is 111221201197. The next prime is 111221201233. The reversal of 111221201212 is 212102122111.

It is a congruent number.

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, 11891914 + ... + 11901262.

It is an arithmetic number, because the mean of its divisors is an integer number (4469515050).

Almost surely, 2^111221201212 is an apocalyptic number.

It is an amenable number.

111221201212 is a deficient number, since it is larger than the sum of its proper divisors (103315521188).

111221201212 is a wasteful number, since it uses less digits than its factorization.

111221201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142 (or 12140 counting only the distinct ones).

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

Adding to 111221201212 its reverse (212102122111), we get a palindrome (323323323323).

The spelling of 111221201212 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, two hundred twelve".