20320201121 has 4 divisors (see below), whose sum is σ = 22167492144. Its totient is φ = 18472910100.

The previous prime is 20320201093. The next prime is 20320201171. The reversal of 20320201121 is 12110202302.

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 20320201121 - 2¹⁰ = 20320200097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320201096 and 20320201105.

It is not an unprimeable number, because it can be changed into a prime (20320201171) 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, 923645495 + ... + 923645516.

It is an arithmetic number, because the mean of its divisors is an integer number (5541873036).

Almost surely, 2^20320201121 is an apocalyptic number.

It is an amenable number.

20320201121 is a deficient number, since it is larger than the sum of its proper divisors (1847291023).

20320201121 is a wasteful number, since it uses less digits than its factorization.

20320201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847291022.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20320201121 its reverse (12110202302), we get a palindrome (32430403423).

The spelling of 20320201121 in words is "twenty billion, three hundred twenty million, two hundred one thousand, one hundred twenty-one".