40242312121 has 8 divisors (see below), whose sum is σ = 43902770688. Its totient is φ = 36582198000.

The previous prime is 40242312091. The next prime is 40242312137. The reversal of 40242312121 is 12121324204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40242312121 - 2¹³ = 40242303929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40242312092 and 40242312101.

It is not an unprimeable number, because it can be changed into a prime (40242312191) 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, 199336 + ... + 346726.

It is an arithmetic number, because the mean of its divisors is an integer number (5487846336).

Almost surely, 2^40242312121 is an apocalyptic number.

It is an amenable number.

40242312121 is a deficient number, since it is larger than the sum of its proper divisors (3660458567).

40242312121 is a wasteful number, since it uses less digits than its factorization.

40242312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172223.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 40242312121 its reverse (12121324204), we get a palindrome (52363636325).

The spelling of 40242312121 in words is "forty billion, two hundred forty-two million, three hundred twelve thousand, one hundred twenty-one".