40040321212 has 12 divisors (see below), whose sum is σ = 70540835400. Its totient is φ = 19885796816.

The previous prime is 40040321203. The next prime is 40040321281. The reversal of 40040321212 is 21212304004.

It is a self number, because there is not a number n which added to its sum of digits gives 40040321212.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 33590278 + ... + 33591469.

It is an arithmetic number, because the mean of its divisors is an integer number (5878402950).

Almost surely, 2^40040321212 is an apocalyptic number.

It is an amenable number.

40040321212 is a deficient number, since it is larger than the sum of its proper divisors (30500514188).

40040321212 is a wasteful number, since it uses less digits than its factorization.

40040321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67181900 (or 67181898 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 40040321212 its reverse (21212304004), we get a palindrome (61252625216).

The spelling of 40040321212 in words is "forty billion, forty million, three hundred twenty-one thousand, two hundred twelve".