221211044012 has 24 divisors (see below), whose sum is σ = 452710976256. Its totient is φ = 92599971408.

The previous prime is 221211044003. The next prime is 221211044027. The reversal of 221211044012 is 210440112122.

221211044012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221211044012² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91863848 + ... + 91866255.

It is an arithmetic number, because the mean of its divisors is an integer number (18862957344).

Almost surely, 2^221211044012 is an apocalyptic number.

It is an amenable number.

221211044012 is an abundant number, since it is smaller than the sum of its proper divisors (231499932244).

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

221211044012 is a wasteful number, since it uses less digits than its factorization.

221211044012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183730157 (or 183730155 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221211044012 its reverse (210440112122), we get a palindrome (431651156134).

The spelling of 221211044012 in words is "two hundred twenty-one billion, two hundred eleven million, forty-four thousand, twelve".