222121010212 has 6 divisors (see below), whose sum is σ = 388711767878. Its totient is φ = 111060505104.

The previous prime is 222121010207. The next prime is 222121010213. The reversal of 222121010212 is 212010121222.

It is a happy number.

222121010212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 187475144256 + 34645865956 = 432984^2 + 186134^2 .

It is not an unprimeable number, because it can be changed into a prime (222121010213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765126273 + ... + 27765126280.

Almost surely, 2^222121010212 is an apocalyptic number.

It is an amenable number.

222121010212 is a deficient number, since it is larger than the sum of its proper divisors (166590757666).

222121010212 is a wasteful number, since it uses less digits than its factorization.

222121010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530252557 (or 55530252555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222121010212 its reverse (212010121222), we get a palindrome (434131131434).

It can be divided in two parts, 222121010 and 212, that added together give a palindrome (222121222).

The spelling of 222121010212 in words is "two hundred twenty-two billion, one hundred twenty-one million, ten thousand, two hundred twelve".