212120020012 has 18 divisors (see below), whose sum is σ = 394330385372. Its totient is φ = 99821185344.

The previous prime is 212120019919. The next prime is 212120020067. The reversal of 212120020012 is 210020021212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212120019974 and 212120020001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91746258 + ... + 91748569.

Almost surely, 2^212120020012 is an apocalyptic number.

It is an amenable number.

212120020012 is a deficient number, since it is larger than the sum of its proper divisors (182210365360).

212120020012 is a wasteful number, since it uses less digits than its factorization.

212120020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183494865 (or 183494846 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212120020012 its reverse (210020021212), we get a palindrome (422140041224).

The spelling of 212120020012 in words is "two hundred twelve billion, one hundred twenty million, twenty thousand, twelve".