222221000212 has 24 divisors (see below), whose sum is σ = 392373545256. Its totient is φ = 110114500608.

The previous prime is 222221000207. The next prime is 222221000303. The reversal of 222221000212 is 212000122222.

It can be written as a sum of positive squares in 4 ways, for example, as 5888106756 + 216332893456 = 76734^2 + 465116^2 .

It is a congruent number.

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, 4793898 + ... + 4840030.

It is an arithmetic number, because the mean of its divisors is an integer number (16348897719).

Almost surely, 2^222221000212 is an apocalyptic number.

It is an amenable number.

222221000212 is a deficient number, since it is larger than the sum of its proper divisors (170152545044).

222221000212 is a wasteful number, since it uses less digits than its factorization.

222221000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56907 (or 56905 counting only the distinct ones).

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

Adding to 222221000212 its reverse (212000122222), we get a palindrome (434221122434).

The spelling of 222221000212 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve", and thus it is an aban number.