20310303121 has 4 divisors (see below), whose sum is σ = 21505026852. Its totient is φ = 19115579392.

The previous prime is 20310303113. The next prime is 20310303161. The reversal of 20310303121 is 12130301302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14578147600 + 5732155521 = 120740^2 + 75711^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310303121 - 2³ = 20310303113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310303095 and 20310303104.

It is not an unprimeable number, because it can be changed into a prime (20310303161) 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, 597361840 + ... + 597361873.

It is an arithmetic number, because the mean of its divisors is an integer number (5376256713).

Almost surely, 2^20310303121 is an apocalyptic number.

It is an amenable number.

20310303121 is a deficient number, since it is larger than the sum of its proper divisors (1194723731).

20310303121 is a wasteful number, since it uses less digits than its factorization.

20310303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194723730.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20310303121 its reverse (12130301302), we get a palindrome (32440604423).

The spelling of 20310303121 in words is "twenty billion, three hundred ten million, three hundred three thousand, one hundred twenty-one".