111221121010000 has 100 divisors (see below), whose sum is σ = 275006764815552. Its totient is φ = 43541885488000.

The previous prime is 111221121009991. The next prime is 111221121010033. The reversal of 111221121010000 is 10121122111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117850342 + ... + 118790341.

Almost surely, 2^{111221121010000} is an apocalyptic number.

111221121010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221121010000 is an abundant number, since it is smaller than the sum of its proper divisors (163785643805552).

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

111221121010000 is an equidigital number, since it uses as much as digits as its factorization.

111221121010000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236640758 (or 236640737 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111221121010000 its reverse (10121122111), we get a palindrome (111231242132111).

The spelling of 111221121010000 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, ten thousand".