40221212 has 12 divisors (see below), whose sum is σ = 70458360. Its totient is φ = 20090256.

The previous prime is 40221199. The next prime is 40221221. The reversal of 40221212 is 21212204.

40221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 98 + ... + 8969.

It is an arithmetic number, because the mean of its divisors is an integer number (5871530).

Almost surely, 2^40221212 is an apocalyptic number.

It is an amenable number.

40221212 is a deficient number, since it is larger than the sum of its proper divisors (30237148).

40221212 is a wasteful number, since it uses less digits than its factorization.

40221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10180 (or 10178 counting only the distinct ones).

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

The square root of 40221212 is about 6342.0195521616. The cubic root of 40221212 is about 342.6244760408.

Adding to 40221212 its reverse (21212204), we get a palindrome (61433416).

The spelling of 40221212 in words is "forty million, two hundred twenty-one thousand, two hundred twelve".