222000012 has 36 divisors (see below), whose sum is σ = 604334640. Its totient is φ = 68307552.

The previous prime is 221999993. The next prime is 222000019. The reversal of 222000012 is 210000222.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221999958 and 222000003.

It is not an unprimeable number, because it can be changed into a prime (222000019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236712 + ... + 237647.

Almost surely, 2^222000012 is an apocalyptic number.

It is an amenable number.

222000012 is an abundant number, since it is smaller than the sum of its proper divisors (382334628).

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

222000012 is a wasteful number, since it uses less digits than its factorization.

222000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474382 (or 474377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 222000012 is about 14899.6648284450. The cubic root of 222000012 is about 605.5049055611.

Adding to 222000012 its reverse (210000222), we get a palindrome (432000234).

The spelling of 222000012 in words is "two hundred twenty-two million, twelve", and thus it is an aban number.