20013101111 has 2 divisors, whose sum is σ = 20013101112. Its totient is φ = 20013101110.

The previous prime is 20013101099. The next prime is 20013101149. The reversal of 20013101111 is 11110131002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013101111 - 2¹⁴ = 20013084727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013101092 and 20013101101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013107111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006550555 + 10006550556.

It is an arithmetic number, because the mean of its divisors is an integer number (10006550556).

Almost surely, 2^20013101111 is an apocalyptic number.

20013101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013101111 is an equidigital number, since it uses as much as digits as its factorization.

20013101111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 20013101111 its reverse (11110131002), we get a palindrome (31123232113).

The spelling of 20013101111 in words is "twenty billion, thirteen million, one hundred one thousand, one hundred eleven".