20001100111 has 2 divisors, whose sum is σ = 20001100112. Its totient is φ = 20001100110.

The previous prime is 20001100073. The next prime is 20001100121. The reversal of 20001100111 is 11100110002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001100111 - 2¹¹ = 20001098063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001100094 and 20001100103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001100121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550055 + 10000550056.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550056).

Almost surely, 2^20001100111 is an apocalyptic number.

20001100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001100111 is an equidigital number, since it uses as much as digits as its factorization.

20001100111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20001100111 its reverse (11100110002), we get a palindrome (31101210113).

The spelling of 20001100111 in words is "twenty billion, one million, one hundred thousand, one hundred eleven".