20113220321121 has 16 divisors (see below), whose sum is σ = 26856078288128. Its totient is φ = 13389591600000.

The previous prime is 20113220321111. The next prime is 20113220321141. The reversal of 20113220321121 is 12112302231102.

It is not a de Polignac number, because 20113220321121 - 2¹⁸ = 20113220058977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113220321111) 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, 21856125 + ... + 22757781.

It is an arithmetic number, because the mean of its divisors is an integer number (1678504893008).

Almost surely, 2^{20113220321121} is an apocalyptic number.

It is an amenable number.

20113220321121 is a deficient number, since it is larger than the sum of its proper divisors (6742857967007).

20113220321121 is an equidigital number, since it uses as much as digits as its factorization.

20113220321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912312.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20113220321121 its reverse (12112302231102), we get a palindrome (32225522552223).

The spelling of 20113220321121 in words is "twenty trillion, one hundred thirteen billion, two hundred twenty million, three hundred twenty-one thousand, one hundred twenty-one".