321123010111 has 2 divisors, whose sum is σ = 321123010112. Its totient is φ = 321123010110.

The previous prime is 321123010079. The next prime is 321123010141. The reversal of 321123010111 is 111010321123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321123010111 - 2⁵ = 321123010079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321123010141) 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, 160561505055 + 160561505056.

It is an arithmetic number, because the mean of its divisors is an integer number (160561505056).

Almost surely, 2^321123010111 is an apocalyptic number.

321123010111 is a deficient number, since it is larger than the sum of its proper divisors (1).

321123010111 is an equidigital number, since it uses as much as digits as its factorization.

321123010111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 321123010111 its reverse (111010321123), we get a palindrome (432133331234).

The spelling of 321123010111 in words is "three hundred twenty-one billion, one hundred twenty-three million, ten thousand, one hundred eleven".