40403012321 has 16 divisors (see below), whose sum is σ = 47010862080. Its totient is φ = 34005495120.

The previous prime is 40403012269. The next prime is 40403012339. The reversal of 40403012321 is 12321030404.

It is a cyclic number.

It is not a de Polignac number, because 40403012321 - 2²² = 40398818017 is a prime.

It is a super-2 number, since 2×40403012321² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40403012293 and 40403012302.

It is not an unprimeable number, because it can be changed into a prime (40403012371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311186 + ... + 421476.

It is an arithmetic number, because the mean of its divisors is an integer number (2938178880).

Almost surely, 2^40403012321 is an apocalyptic number.

It is an amenable number.

40403012321 is a deficient number, since it is larger than the sum of its proper divisors (6607849759).

40403012321 is a wasteful number, since it uses less digits than its factorization.

40403012321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111244.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 40403012321 its reverse (12321030404), we get a palindrome (52724042725).

The spelling of 40403012321 in words is "forty billion, four hundred three million, twelve thousand, three hundred twenty-one".