111212310000 has 300 divisors, whose sum is σ = 394625160776. Its totient is φ = 26959680000.

The previous prime is 111212309983. The next prime is 111212310023. The reversal of 111212310000 is 13212111.

It is a tau number, because it is divible by the number of its divisors (300).

It is a super-2 number, since 2×111212310000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3614682 + ... + 3645318.

Almost surely, 2^111212310000 is an apocalyptic number.

111212310000 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 111212310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197312580388).

111212310000 is an abundant number, since it is smaller than the sum of its proper divisors (283412850776).

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

111212310000 is a wasteful number, since it uses less digits than its factorization.

111212310000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30690 (or 30658 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 111212310000 its reverse (13212111), we get a palindrome (111225522111).

The spelling of 111212310000 in words is "one hundred eleven billion, two hundred twelve million, three hundred ten thousand".