20342204403121 has 16 divisors (see below), whose sum is σ = 20636093808000. Its totient is φ = 20050305580800.

The previous prime is 20342204403083. The next prime is 20342204403149. The reversal of 20342204403121 is 12130440224302.

It is a cyclic number.

It is not a de Polignac number, because 20342204403121 - 2¹⁵ = 20342204370353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20342204403121.

It is not an unprimeable number, because it can be changed into a prime (20342204403161) 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 15 ways as a sum of consecutive naturals, for example, 112073481 + ... + 112254841.

It is an arithmetic number, because the mean of its divisors is an integer number (1289755863000).

Almost surely, 2^{20342204403121} is an apocalyptic number.

It is an amenable number.

20342204403121 is a deficient number, since it is larger than the sum of its proper divisors (293889404879).

20342204403121 is a wasteful number, since it uses less digits than its factorization.

20342204403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186840.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20342204403121 its reverse (12130440224302), we get a palindrome (32472644627423).

The spelling of 20342204403121 in words is "twenty trillion, three hundred forty-two billion, two hundred four million, four hundred three thousand, one hundred twenty-one".