111221222000 has 80 divisors (see below), whose sum is σ = 307351941312. Its totient is φ = 38132985600.

The previous prime is 111221221997. The next prime is 111221222023. The reversal of 111221222000 is 222122111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3958187 + ... + 3986186.

Almost surely, 2^111221222000 is an apocalyptic number.

111221222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221222000 is an abundant number, since it is smaller than the sum of its proper divisors (196130719312).

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

111221222000 is an equidigital number, since it uses as much as digits as its factorization.

111221222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944403 (or 7944387 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 111221222000 its reverse (222122111), we get a palindrome (111443344111).

The spelling of 111221222000 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand".