20321101111 has 2 divisors, whose sum is σ = 20321101112. Its totient is φ = 20321101110.

The previous prime is 20321101093. The next prime is 20321101117. The reversal of 20321101111 is 11110112302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20321101111 - 2¹⁵ = 20321068343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321101091 and 20321101100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321101117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160550555 + 10160550556.

It is an arithmetic number, because the mean of its divisors is an integer number (10160550556).

Almost surely, 2^20321101111 is an apocalyptic number.

20321101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321101111 is an equidigital number, since it uses as much as digits as its factorization.

20321101111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20321101111 its reverse (11110112302), we get a palindrome (31431213413).

The spelling of 20321101111 in words is "twenty billion, three hundred twenty-one million, one hundred one thousand, one hundred eleven".