40403123121 has 8 divisors (see below), whose sum is σ = 56213040960. Its totient is φ = 25764310352.

The previous prime is 40403123113. The next prime is 40403123149. The reversal of 40403123121 is 12132130404.

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 40403123121 - 2³ = 40403123113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40403123161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292776186 + ... + 292776323.

It is an arithmetic number, because the mean of its divisors is an integer number (7026630120).

Almost surely, 2^40403123121 is an apocalyptic number.

It is an amenable number.

40403123121 is a deficient number, since it is larger than the sum of its proper divisors (15809917839).

40403123121 is a wasteful number, since it uses less digits than its factorization.

40403123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585552535.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 40403123121 its reverse (12132130404), we get a palindrome (52535253525).

The spelling of 40403123121 in words is "forty billion, four hundred three million, one hundred twenty-three thousand, one hundred twenty-one".