20321000111 has 2 divisors, whose sum is σ = 20321000112. Its totient is φ = 20321000110.

The previous prime is 20321000101. The next prime is 20321000113. The reversal of 20321000111 is 11100012302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20321000111 - 2³⁰ = 19247258287 is a prime.

It is a super-2 number, since 2×20321000111² (a number of 21 digits) contains 22 as substring.

Together with 20321000113, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321000092 and 20321000101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321000113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160500055 + 10160500056.

It is an arithmetic number, because the mean of its divisors is an integer number (10160500056).

Almost surely, 2^20321000111 is an apocalyptic number.

20321000111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321000111 is an equidigital number, since it uses as much as digits as its factorization.

20321000111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20321000111 its reverse (11100012302), we get a palindrome (31421012413).

The spelling of 20321000111 in words is "twenty billion, three hundred twenty-one million, one hundred eleven", and thus it is an aban number.