20110311311 has 2 divisors, whose sum is σ = 20110311312. Its totient is φ = 20110311310.

The previous prime is 20110311307. The next prime is 20110311329. The reversal of 20110311311 is 11311301102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110311311 - 2² = 20110311307 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110301311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055155655 + 10055155656.

It is an arithmetic number, because the mean of its divisors is an integer number (10055155656).

Almost surely, 2^20110311311 is an apocalyptic number.

20110311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110311311 is an equidigital number, since it uses as much as digits as its factorization.

20110311311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20110311311 its reverse (11311301102), we get a palindrome (31421612413).

The spelling of 20110311311 in words is "twenty billion, one hundred ten million, three hundred eleven thousand, three hundred eleven".