231010201111 has 2 divisors, whose sum is σ = 231010201112. Its totient is φ = 231010201110.

The previous prime is 231010201061. The next prime is 231010201153. The reversal of 231010201111 is 111102010132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231010201111 - 2⁷ = 231010200983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231010201091 and 231010201100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231010201181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115505100555 + 115505100556.

It is an arithmetic number, because the mean of its divisors is an integer number (115505100556).

Almost surely, 2^231010201111 is an apocalyptic number.

231010201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231010201111 is an equidigital number, since it uses as much as digits as its factorization.

231010201111 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 13.

Adding to 231010201111 its reverse (111102010132), we get a palindrome (342112211243).

The spelling of 231010201111 in words is "two hundred thirty-one billion, ten million, two hundred one thousand, one hundred eleven".