111222021000000 has 392 divisors, whose sum is σ = 374074108665120. Its totient is φ = 29156460800000.

The previous prime is 111222020999983. The next prime is 111222021000007. The reversal of 111222021000000 is 120222111.

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

It is a self number, because there is not a number n which added to its sum of digits gives 111222021000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222021000007) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 176685814 + ... + 177314186.

Almost surely, 2^{111222021000000} is an apocalyptic number.

111222021000000 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 111222021000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187037054332560).

111222021000000 is an abundant number, since it is smaller than the sum of its proper divisors (262852087665120).

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

111222021000000 is an frugal number, since it uses more digits than its factorization.

111222021000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628477 (or 628442 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111222021000000 its reverse (120222111), we get a palindrome (111222141222111).

The spelling of 111222021000000 in words is "one hundred eleven trillion, two hundred twenty-two billion, twenty-one million", and thus it is an aban number.