111210121000000 has 196 divisors, whose sum is σ = 300926974022928. Its totient is φ = 40440040000000.

The previous prime is 111210120999977. The next prime is 111210121000103. The reversal of 111210121000000 is 121012111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5944995 + ... + 16055005.

Almost surely, 2^{111210121000000} is an apocalyptic number.

111210121000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111210121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150463487011464).

111210121000000 is an abundant number, since it is smaller than the sum of its proper divisors (189716853022928).

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

111210121000000 is an frugal number, since it uses more digits than its factorization.

111210121000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110064 (or 10110029 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111210121000000 its reverse (121012111), we get a palindrome (111210242012111).

The spelling of 111210121000000 in words is "one hundred eleven trillion, two hundred ten billion, one hundred twenty-one million", and thus it is an aban number.