12400212 has 24 divisors (see below), whose sum is σ = 31564512. Its totient is φ = 3757600.

The previous prime is 12400183. The next prime is 12400231. The reversal of 12400212 is 21200421.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 46839 + ... + 47102.

It is an arithmetic number, because the mean of its divisors is an integer number (1315188).

Almost surely, 2^12400212 is an apocalyptic number.

12400212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12400212 is an abundant number, since it is smaller than the sum of its proper divisors (19164300).

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

12400212 is a wasteful number, since it uses less digits than its factorization.

12400212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93959 (or 93957 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12400212 is about 3521.3934741804. The cubic root of 12400212 is about 231.4602245120.

Adding to 12400212 its reverse (21200421), we get a palindrome (33600633).

The spelling of 12400212 in words is "twelve million, four hundred thousand, two hundred twelve".