111221011010000 has 50 divisors (see below), whose sum is σ = 269277189780522. Its totient is φ = 44488404400000.

The previous prime is 111221011009991. The next prime is 111221011010023. The reversal of 111221011010000 is 10110122111.

It can be written as a sum of positive squares in 5 ways, for example, as 16188616626064 + 95032394383936 = 4023508^2 + 9748456^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a super-2 number, since 2×111221011010000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5561040551 + ... + 5561060550.

Almost surely, 2^{111221011010000} is an apocalyptic number.

111221011010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221011010000 is an abundant number, since it is smaller than the sum of its proper divisors (158056178770522).

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

111221011010000 is an equidigital number, since it uses as much as digits as its factorization.

111221011010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122101129 (or 11122101108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111221011010000 its reverse (10110122111), we get a palindrome (111231121132111).

The spelling of 111221011010000 in words is "one hundred eleven trillion, two hundred twenty-one billion, eleven million, ten thousand".