20011313111 has 2 divisors, whose sum is σ = 20011313112. Its totient is φ = 20011313110.

The previous prime is 20011313107. The next prime is 20011313117. The reversal of 20011313111 is 11131311002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011313111 - 2² = 20011313107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011313117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005656555 + 10005656556.

It is an arithmetic number, because the mean of its divisors is an integer number (10005656556).

Almost surely, 2^20011313111 is an apocalyptic number.

20011313111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011313111 is an equidigital number, since it uses as much as digits as its factorization.

20011313111 is an evil number, because the sum of its binary digits is even.

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

Adding to 20011313111 its reverse (11131311002), we get a palindrome (31142624113).

The spelling of 20011313111 in words is "twenty billion, eleven million, three hundred thirteen thousand, one hundred eleven".