111212120012 has 48 divisors (see below), whose sum is σ = 227895628800. Its totient is φ = 46490371200.

The previous prime is 111212120003. The next prime is 111212120057. The reversal of 111212120012 is 210021212111.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 10555187 + ... + 10565717.

It is an arithmetic number, because the mean of its divisors is an integer number (4747825600).

Almost surely, 2^111212120012 is an apocalyptic number.

It is an amenable number.

111212120012 is an abundant number, since it is smaller than the sum of its proper divisors (116683508788).

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

111212120012 is a wasteful number, since it uses less digits than its factorization.

111212120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19782 (or 19780 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111212120012 its reverse (210021212111), we get a palindrome (321233332123).

The spelling of 111212120012 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty thousand, twelve".