111912010212 has 24 divisors (see below), whose sum is σ = 261967672512. Its totient is φ = 37184053600.

The previous prime is 111912010211. The next prime is 111912010229. The reversal of 111912010212 is 212010219111.

It is not an unprimeable number, because it can be changed into a prime (111912010211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14989839 + ... + 14997302.

It is an arithmetic number, because the mean of its divisors is an integer number (10915319688).

Almost surely, 2^111912010212 is an apocalyptic number.

111912010212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111912010212 is an abundant number, since it is smaller than the sum of its proper divisors (150055662300).

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

111912010212 is a wasteful number, since it uses less digits than its factorization.

111912010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29987459 (or 29987457 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 111912010212 its reverse (212010219111), we get a palindrome (323922229323).

The spelling of 111912010212 in words is "one hundred eleven billion, nine hundred twelve million, ten thousand, two hundred twelve".