20013107111 has 2 divisors, whose sum is σ = 20013107112. Its totient is φ = 20013107110.

The previous prime is 20013107087. The next prime is 20013107117. The reversal of 20013107111 is 11170131002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013107111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20013107111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013107117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006553555 + 10006553556.

It is an arithmetic number, because the mean of its divisors is an integer number (10006553556).

Almost surely, 2^20013107111 is an apocalyptic number.

20013107111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013107111 is an equidigital number, since it uses as much as digits as its factorization.

20013107111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 17.

Adding to 20013107111 its reverse (11170131002), we get a palindrome (31183238113).

The spelling of 20013107111 in words is "twenty billion, thirteen million, one hundred seven thousand, one hundred eleven".