221021010112 has 56 divisors (see below), whose sum is σ = 501335690240. Its totient is φ = 94705977600.

The previous prime is 221021010103. The next prime is 221021010143. The reversal of 221021010112 is 211010120122.

221021010112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 221021010092 and 221021010101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579089 + ... + 2663407.

It is an arithmetic number, because the mean of its divisors is an integer number (8952423040).

Almost surely, 2^221021010112 is an apocalyptic number.

It is an amenable number.

221021010112 is an abundant number, since it is smaller than the sum of its proper divisors (280314680128).

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

221021010112 is an equidigital number, since it uses as much as digits as its factorization.

221021010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90189 (or 90179 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221021010112 its reverse (211010120122), we get a palindrome (432031130234).

The spelling of 221021010112 in words is "two hundred twenty-one billion, twenty-one million, ten thousand, one hundred twelve".