20011230311 has 2 divisors, whose sum is σ = 20011230312. Its totient is φ = 20011230310.

The previous prime is 20011230287. The next prime is 20011230313. The reversal of 20011230311 is 11303211002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011230311 is a prime.

Together with 20011230313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011230313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005615155 + 10005615156.

It is an arithmetic number, because the mean of its divisors is an integer number (10005615156).

Almost surely, 2^20011230311 is an apocalyptic number.

20011230311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011230311 is an equidigital number, since it uses as much as digits as its factorization.

20011230311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20011230311 its reverse (11303211002), we get a palindrome (31314441313).

The spelling of 20011230311 in words is "twenty billion, eleven million, two hundred thirty thousand, three hundred eleven".