20012311331 has 2 divisors, whose sum is σ = 20012311332. Its totient is φ = 20012311330.

The previous prime is 20012311301. The next prime is 20012311343. The reversal of 20012311331 is 13311321002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012311331 is a prime.

It is a super-2 number, since 2×20012311331² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20012311301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006155665 + 10006155666.

It is an arithmetic number, because the mean of its divisors is an integer number (10006155666).

Almost surely, 2^20012311331 is an apocalyptic number.

20012311331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012311331 is an equidigital number, since it uses as much as digits as its factorization.

20012311331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20012311331 its reverse (13311321002), we get a palindrome (33323632333).

The spelling of 20012311331 in words is "twenty billion, twelve million, three hundred eleven thousand, three hundred thirty-one".