40121313242 has 16 divisors (see below), whose sum is σ = 60814119912. Its totient is φ = 19850019840.

The previous prime is 40121313223. The next prime is 40121313247. The reversal of 40121313242 is 24231312104.

It can be written as a sum of positive squares in 4 ways, for example, as 33011619481 + 7109693761 = 181691^2 + 84319^2 .

It is not an unprimeable number, because it can be changed into a prime (40121313247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172942 + ... + 1206662.

Almost surely, 2^40121313242 is an apocalyptic number.

40121313242 is a deficient number, since it is larger than the sum of its proper divisors (20692806670).

40121313242 is a wasteful number, since it uses less digits than its factorization.

40121313242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39953.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 40121313242 its reverse (24231312104), we get a palindrome (64352625346).

The spelling of 40121313242 in words is "forty billion, one hundred twenty-one million, three hundred thirteen thousand, two hundred forty-two".