40000104012521 has 4 divisors (see below), whose sum is σ = 40678071877200. Its totient is φ = 39322136147844.

The previous prime is 40000104012439. The next prime is 40000104012563. The reversal of 40000104012521 is 12521040100004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40000104012521 - 2³⁸ = 39725226105577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40000104012493 and 40000104012502.

It is not an unprimeable number, because it can be changed into a prime (40000104012721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338983932251 + ... + 338983932368.

It is an arithmetic number, because the mean of its divisors is an integer number (10169517969300).

Almost surely, 2^{40000104012521} is an apocalyptic number.

It is an amenable number.

40000104012521 is a deficient number, since it is larger than the sum of its proper divisors (677967864679).

40000104012521 is an equidigital number, since it uses as much as digits as its factorization.

40000104012521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677967864678.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 40000104012521 its reverse (12521040100004), we get a palindrome (52521144112525).

The spelling of 40000104012521 in words is "forty trillion, one hundred four million, twelve thousand, five hundred twenty-one".