221344012 has 12 divisors (see below), whose sum is σ = 410137560. Its totient is φ = 104161856.

The previous prime is 221344007. The next prime is 221344031. The reversal of 221344012 is 210443122.

It is a super-2 number, since 2×221344012² = 97986343296512288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627462 + ... + 1627597.

It is an arithmetic number, because the mean of its divisors is an integer number (34178130).

Almost surely, 2^221344012 is an apocalyptic number.

It is an amenable number.

221344012 is a deficient number, since it is larger than the sum of its proper divisors (188793548).

221344012 is a wasteful number, since it uses less digits than its factorization.

221344012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255080 (or 3255078 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221344012 is about 14877.6346238238. The cubic root of 221344012 is about 604.9079039287.

Adding to 221344012 its reverse (210443122), we get a palindrome (431787134).

It can be divided in two parts, 2213 and 44012, that added together give a square (46225 = 215²).

The spelling of 221344012 in words is "two hundred twenty-one million, three hundred forty-four thousand, twelve".