20311321127 has 2 divisors, whose sum is σ = 20311321128. Its totient is φ = 20311321126.

The previous prime is 20311321087. The next prime is 20311321133. The reversal of 20311321127 is 72112311302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20311321127 - 2¹² = 20311317031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311326127) 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 as a sum of consecutive naturals, namely, 10155660563 + 10155660564.

It is an arithmetic number, because the mean of its divisors is an integer number (10155660564).

Almost surely, 2^20311321127 is an apocalyptic number.

20311321127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311321127 is an equidigital number, since it uses as much as digits as its factorization.

20311321127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 20311321127 its reverse (72112311302), we get a palindrome (92423632429).

The spelling of 20311321127 in words is "twenty billion, three hundred eleven million, three hundred twenty-one thousand, one hundred twenty-seven".