221044012 has 24 divisors (see below), whose sum is σ = 456350720. Its totient is φ = 91676880.

The previous prime is 221044009. The next prime is 221044027. The reversal of 221044012 is 210440122.

It is a super-2 number, since 2×221044012² = 97720910482112288, which 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, 126462 + ... + 128197.

Almost surely, 2^221044012 is an apocalyptic number.

It is an amenable number.

221044012 is an abundant number, since it is smaller than the sum of its proper divisors (235306708).

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

221044012 is a wasteful number, since it uses less digits than its factorization.

221044012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254701 (or 254699 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221044012 is about 14867.5489573769. The cubic root of 221044012 is about 604.6344917894.

Adding to 221044012 its reverse (210440122), we get a palindrome (431484134).

It can be divided in two parts, 2 and 21044012, that multiplied together give a palindrome (42088024).

The spelling of 221044012 in words is "two hundred twenty-one million, forty-four thousand, twelve".