221441012 has 24 divisors (see below), whose sum is σ = 422367456. Its totient is φ = 100970208.

The previous prime is 221440981. The next prime is 221441053. The reversal of 221441012 is 210144122.

It is a super-2 number, since 2×221441012² = 98072243591168288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21338 + ... + 29969.

It is an arithmetic number, because the mean of its divisors is an integer number (17598644).

Almost surely, 2^221441012 is an apocalyptic number.

It is an amenable number.

221441012 is a deficient number, since it is larger than the sum of its proper divisors (200926444).

221441012 is a wasteful number, since it uses less digits than its factorization.

221441012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51407 (or 51405 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 221441012 is about 14880.8941935624. The cubic root of 221441012 is about 604.9962543310.

Adding to 221441012 its reverse (210144122), we get a palindrome (431585134).

The spelling of 221441012 in words is "two hundred twenty-one million, four hundred forty-one thousand, twelve".