111212120000 has 70 divisors (see below), whose sum is σ = 275770012848. Its totient is φ = 44484832000.

The previous prime is 111212119979. The next prime is 111212120003. The reversal of 111212120000 is 21212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212120003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1350152 + ... + 1430151.

Almost surely, 2^111212120000 is an apocalyptic number.

111212120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212120000 is an abundant number, since it is smaller than the sum of its proper divisors (164557892848).

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

111212120000 is an frugal number, since it uses more digits than its factorization.

111212120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780335 (or 2780310 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111212120000 its reverse (21212111), we get a palindrome (111233332111).

The spelling of 111212120000 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty thousand".