20303104121 has 2 divisors, whose sum is σ = 20303104122. Its totient is φ = 20303104120.

The previous prime is 20303104103. The next prime is 20303104147. The reversal of 20303104121 is 12140130302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20089944121 + 213160000 = 141739^2 + 14600^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303104121 - 2¹⁰ = 20303103097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20303104121.

It is not a weakly prime, because it can be changed into another prime (20303104181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151552060 + 10151552061.

It is an arithmetic number, because the mean of its divisors is an integer number (10151552061).

Almost surely, 2^20303104121 is an apocalyptic number.

It is an amenable number.

20303104121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303104121 is an equidigital number, since it uses as much as digits as its factorization.

20303104121 is an evil number, because the sum of its binary digits is even.

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

Adding to 20303104121 its reverse (12140130302), we get a palindrome (32443234423).

The spelling of 20303104121 in words is "twenty billion, three hundred three million, one hundred four thousand, one hundred twenty-one".