212420012 has 24 divisors (see below), whose sum is σ = 439491360. Its totient is φ = 87897600.

The previous prime is 212420003. The next prime is 212420027. The reversal of 212420012 is 210024212.

It is a super-2 number, since 2×212420012² = 90244522996160288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 129989 + ... + 131612.

It is an arithmetic number, because the mean of its divisors is an integer number (18312140).

Almost surely, 2^212420012 is an apocalyptic number.

It is an amenable number.

212420012 is an abundant number, since it is smaller than the sum of its proper divisors (227071348).

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

212420012 is a wasteful number, since it uses less digits than its factorization.

212420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261641 (or 261639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 212420012 is about 14574.6359131198. The cubic root of 212420012 is about 596.6667125801. Note that the first 3 decimals are identical.

Adding to 212420012 its reverse (210024212), we get a palindrome (422444224).

It can be divided in two parts, 2124200 and 12, that added together give a palindrome (2124212).

The spelling of 212420012 in words is "two hundred twelve million, four hundred twenty thousand, twelve".