221222103012012 has 12 divisors (see below), whose sum is σ = 516184907028056. Its totient is φ = 73740701004000.

The previous prime is 221222103011981. The next prime is 221222103012013. The reversal of 221222103012012 is 210210301222122.

221222103012012 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 (12).

It is a super-2 number, since 2×221222103012012² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221222103012012.

It is not an unprimeable number, because it can be changed into a prime (221222103012013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9217587625489 + ... + 9217587625512.

Almost surely, 2^{221222103012012} is an apocalyptic number.

It is an amenable number.

221222103012012 is an abundant number, since it is smaller than the sum of its proper divisors (294962804016044).

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

221222103012012 is a wasteful number, since it uses less digits than its factorization.

221222103012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18435175251008 (or 18435175251006 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221222103012012 its reverse (210210301222122), we get a palindrome (431432404234134).

The spelling of 221222103012012 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred three million, twelve thousand, twelve".