20311121333 has 2 divisors, whose sum is σ = 20311121334. Its totient is φ = 20311121332.

The previous prime is 20311121329. The next prime is 20311121339. The reversal of 20311121333 is 33312111302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16450114564 + 3861006769 = 128258^2 + 62137^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311121333 - 2² = 20311121329 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311121339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155560666 + 10155560667.

It is an arithmetic number, because the mean of its divisors is an integer number (10155560667).

Almost surely, 2^20311121333 is an apocalyptic number.

It is an amenable number.

20311121333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311121333 is an equidigital number, since it uses as much as digits as its factorization.

20311121333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20311121333 its reverse (33312111302), we get a palindrome (53623232635).

The spelling of 20311121333 in words is "twenty billion, three hundred eleven million, one hundred twenty-one thousand, three hundred thirty-three".