20121404040443 has 8 divisors (see below), whose sum is σ = 21460527111312. Its totient is φ = 18799559977216.

The previous prime is 20121404040379. The next prime is 20121404040461. The reversal of 20121404040443 is 34404040412102.

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

It is not a de Polignac number, because 20121404040443 - 2⁶ = 20121404040379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121404043443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4319749505 + ... + 4319754162.

It is an arithmetic number, because the mean of its divisors is an integer number (2682565888914).

Almost surely, 2^{20121404040443} is an apocalyptic number.

20121404040443 is a deficient number, since it is larger than the sum of its proper divisors (1339123070869).

20121404040443 is a wasteful number, since it uses less digits than its factorization.

20121404040443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8639503821.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20121404040443 its reverse (34404040412102), we get a palindrome (54525444452545).

The spelling of 20121404040443 in words is "twenty trillion, one hundred twenty-one billion, four hundred four million, forty thousand, four hundred forty-three".