20322130121 has 4 divisors (see below), whose sum is σ = 20330933700. Its totient is φ = 20313326544.

The previous prime is 20322130063. The next prime is 20322130133. The reversal of 20322130121 is 12103122302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12103122302 = 2 ⋅6051561151.

It can be written as a sum of positive squares in 2 ways, for example, as 13952334400 + 6369795721 = 118120^2 + 79811^2 .

It is a cyclic number.

It is not a de Polignac number, because 20322130121 - 2¹⁸ = 20321867977 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 20322130121.

It is not an unprimeable number, because it can be changed into a prime (20322130141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4398326 + ... + 4402943.

It is an arithmetic number, because the mean of its divisors is an integer number (5082733425).

Almost surely, 2^20322130121 is an apocalyptic number.

It is an amenable number.

20322130121 is a deficient number, since it is larger than the sum of its proper divisors (8803579).

20322130121 is an equidigital number, since it uses as much as digits as its factorization.

20322130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803578.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20322130121 its reverse (12103122302), we get a palindrome (32425252423).

The spelling of 20322130121 in words is "twenty billion, three hundred twenty-two million, one hundred thirty thousand, one hundred twenty-one".