222221012 has 12 divisors (see below), whose sum is σ = 418801236. Its totient is φ = 102563520.

The previous prime is 222220993. The next prime is 222221047. The reversal of 222221012 is 210122222.

It can be written as a sum of positive squares in 2 ways, for example, as 19044496 + 203176516 = 4364^2 + 14254^2 .

It is a congruent number.

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, 2136689 + ... + 2136792.

It is an arithmetic number, because the mean of its divisors is an integer number (34900103).

Almost surely, 2^222221012 is an apocalyptic number.

It is an amenable number.

222221012 is a deficient number, since it is larger than the sum of its proper divisors (196580224).

222221012 is a wasteful number, since it uses less digits than its factorization.

222221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273498 (or 4273496 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222221012 is about 14907.0792578560. The cubic root of 222221012 is about 605.7057647155.

Adding to 222221012 its reverse (210122222), we get a palindrome (432343234).

It can be divided in two parts, 2222210 and 12, that added together give a palindrome (2222222).

The spelling of 222221012 in words is "two hundred twenty-two million, two hundred twenty-one thousand, twelve".