20424303121 has 2 divisors, whose sum is σ = 20424303122. Its totient is φ = 20424303120.

The previous prime is 20424303113. The next prime is 20424303139. The reversal of 20424303121 is 12130342402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19723112721 + 701190400 = 140439^2 + 26480^2 .

It is a cyclic number.

It is not a de Polignac number, because 20424303121 - 2³ = 20424303113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20424303092 and 20424303101.

It is not a weakly prime, because it can be changed into another prime (20424303161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212151560 + 10212151561.

It is an arithmetic number, because the mean of its divisors is an integer number (10212151561).

Almost surely, 2^20424303121 is an apocalyptic number.

It is an amenable number.

20424303121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424303121 is an equidigital number, since it uses as much as digits as its factorization.

20424303121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20424303121 its reverse (12130342402), we get a palindrome (32554645523).

The spelling of 20424303121 in words is "twenty billion, four hundred twenty-four million, three hundred three thousand, one hundred twenty-one".