212120012 has 36 divisors (see below), whose sum is σ = 404437320. Its totient is φ = 97299072.

The previous prime is 212120003. The next prime is 212120017. The reversal of 212120012 is 210021212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212119975 and 212120002.

It is not an unprimeable number, because it can be changed into a prime (212120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120128 + ... + 121880.

It is an arithmetic number, because the mean of its divisors is an integer number (11234370).

Almost surely, 2^212120012 is an apocalyptic number.

It is an amenable number.

212120012 is a deficient number, since it is larger than the sum of its proper divisors (192317308).

212120012 is a wasteful number, since it uses less digits than its factorization.

212120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 212120012 is about 14564.3404244751. The cubic root of 212120012 is about 596.3856901766.

Adding to 212120012 its reverse (210021212), we get a palindrome (422141224).

It can be divided in two parts, 2121200 and 12, that added together give a palindrome (2121212).

The spelling of 212120012 in words is "two hundred twelve million, one hundred twenty thousand, twelve".