40221012 has 48 divisors (see below), whose sum is σ = 104340992. Its totient is φ = 11975040.

The previous prime is 40221001. The next prime is 40221017. The reversal of 40221012 is 21012204.

40221012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221017) 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 15 ways as a sum of consecutive naturals, for example, 678 + ... + 8994.

Almost surely, 2^40221012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52170496).

40221012 is an abundant number, since it is smaller than the sum of its proper divisors (64119980).

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

40221012 is a wasteful number, since it uses less digits than its factorization.

40221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8368 (or 8366 counting only the distinct ones).

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

The square root of 40221012 is about 6342.0037842940. The cubic root of 40221012 is about 342.6239081398.

Adding to 40221012 its reverse (21012204), we get a palindrome (61233216).

The spelling of 40221012 in words is "forty million, two hundred twenty-one thousand, twelve".