111221110000 has 800 divisors, whose sum is σ = 371732207616. Its totient is φ = 31104000000.

The previous prime is 111221109991. The next prime is 111221110001. The reversal of 111221110000 is 11122111.

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

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221110001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 410409865 + ... + 410410135.

Almost surely, 2^111221110000 is an apocalyptic number.

111221110000 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 111221110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185866103808).

111221110000 is an abundant number, since it is smaller than the sum of its proper divisors (260511097616).

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

111221110000 is a wasteful number, since it uses less digits than its factorization.

111221110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 350 counting only the distinct ones).

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

Adding to 111221110000 its reverse (11122111), we get a palindrome (111232232111).

111221110000 divided by its reverse (11122111) gives a 4-th power (10000 = 10⁴).

It can be divided in two parts, 1112211 and 10000, that added together give a palindrome (1122211).

The spelling of 111221110000 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand".