20303121031 has 2 divisors, whose sum is σ = 20303121032. Its totient is φ = 20303121030.

The previous prime is 20303121017. The next prime is 20303121073. The reversal of 20303121031 is 13012130302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20303121031 - 2²⁷ = 20168903303 is a prime.

It is a super-2 number, since 2×20303121031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20303120996 and 20303121014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303121931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151560515 + 10151560516.

It is an arithmetic number, because the mean of its divisors is an integer number (10151560516).

Almost surely, 2^20303121031 is an apocalyptic number.

20303121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303121031 is an equidigital number, since it uses as much as digits as its factorization.

20303121031 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20303121031 its reverse (13012130302), we get a palindrome (33315251333).

The spelling of 20303121031 in words is "twenty billion, three hundred three million, one hundred twenty-one thousand, thirty-one".