20113111211311 has 2 divisors, whose sum is σ = 20113111211312. Its totient is φ = 20113111211310.

The previous prime is 20113111211257. The next prime is 20113111211339. The reversal of 20113111211311 is 11311211131102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20113111211311 - 2⁷ = 20113111211183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113111211371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056555605655 + 10056555605656.

It is an arithmetic number, because the mean of its divisors is an integer number (10056555605656).

Almost surely, 2^{20113111211311} is an apocalyptic number.

20113111211311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113111211311 is an equidigital number, since it uses as much as digits as its factorization.

20113111211311 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 19.

Adding to 20113111211311 its reverse (11311211131102), we get a palindrome (31424322342413).

The spelling of 20113111211311 in words is "twenty trillion, one hundred thirteen billion, one hundred eleven million, two hundred eleven thousand, three hundred eleven".