212210021212 has 24 divisors (see below), whose sum is σ = 425868591456. Its totient is φ = 90636748608.

The previous prime is 212210021161. The next prime is 212210021281. The reversal of 212210021212 is 212120012212.

It is a happy number.

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, 12925123 + ... + 12941530.

It is an arithmetic number, because the mean of its divisors is an integer number (17744524644).

Almost surely, 2^212210021212 is an apocalyptic number.

It is an amenable number.

212210021212 is an abundant number, since it is smaller than the sum of its proper divisors (213658570244).

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

212210021212 is a wasteful number, since it uses less digits than its factorization.

212210021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25866957 (or 25866955 counting only the distinct ones).

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

Adding to 212210021212 its reverse (212120012212), we get a palindrome (424330033424).

The spelling of 212210021212 in words is "two hundred twelve billion, two hundred ten million, twenty-one thousand, two hundred twelve".