231020210330111 has 2 divisors, whose sum is σ = 231020210330112. Its totient is φ = 231020210330110.

The previous prime is 231020210330089. The next prime is 231020210330149. The reversal of 231020210330111 is 111033012020132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231020210330111 - 2¹⁴ = 231020210313727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231020210339111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510105165055 + 115510105165056.

It is an arithmetic number, because the mean of its divisors is an integer number (115510105165056).

Almost surely, 2^{231020210330111} is an apocalyptic number.

231020210330111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020210330111 is an equidigital number, since it uses as much as digits as its factorization.

231020210330111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231020210330111 its reverse (111033012020132), we get a palindrome (342053222350243).

The spelling of 231020210330111 in words is "two hundred thirty-one trillion, twenty billion, two hundred ten million, three hundred thirty thousand, one hundred eleven".