231000020321111 has 2 divisors, whose sum is σ = 231000020321112. Its totient is φ = 231000020321110.

The previous prime is 231000020321089. The next prime is 231000020321153. The reversal of 231000020321111 is 111123020000132.

231000020321111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231000020321111 - 2⁶ = 231000020321047 is a prime.

It is a super-2 number, since 2×231000020321111² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231000020321111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231000029321111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500010160555 + 115500010160556.

It is an arithmetic number, because the mean of its divisors is an integer number (115500010160556).

Almost surely, 2^{231000020321111} is an apocalyptic number.

231000020321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231000020321111 is an equidigital number, since it uses as much as digits as its factorization.

231000020321111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231000020321111 its reverse (111123020000132), we get a palindrome (342123040321243).

The spelling of 231000020321111 in words is "two hundred thirty-one trillion, twenty million, three hundred twenty-one thousand, one hundred eleven".