221001222112 has 48 divisors (see below), whose sum is σ = 479349937584. Its totient is φ = 99460480000.

The previous prime is 221001222107. The next prime is 221001222139. The reversal of 221001222112 is 211222100122.

It is a happy number.

221001222112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 3072589 + ... + 3143692.

It is an arithmetic number, because the mean of its divisors is an integer number (9986457033).

Almost surely, 2^221001222112 is an apocalyptic number.

221001222112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221001222112 is an abundant number, since it is smaller than the sum of its proper divisors (258348715472).

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

221001222112 is a wasteful number, since it uses less digits than its factorization.

221001222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216403 (or 6216395 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221001222112 its reverse (211222100122), we get a palindrome (432223322234).

It can be divided in two parts, 22100122 and 2112, that multiplied together give a palindrome (46675457664).

The spelling of 221001222112 in words is "two hundred twenty-one billion, one million, two hundred twenty-two thousand, one hundred twelve".