231211263111 has 4 divisors (see below), whose sum is σ = 308281684152. Its totient is φ = 154140842072.

The previous prime is 231211263089. The next prime is 231211263137. The reversal of 231211263111 is 111362112132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231211263111 - 2⁵ = 231211263079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211263211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38535210516 + ... + 38535210521.

It is an arithmetic number, because the mean of its divisors is an integer number (77070421038).

Almost surely, 2^231211263111 is an apocalyptic number.

231211263111 is a deficient number, since it is larger than the sum of its proper divisors (77070421041).

231211263111 is an equidigital number, since it uses as much as digits as its factorization.

231211263111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77070421040.

The product of its digits is 432, while the sum is 24.

Adding to 231211263111 its reverse (111362112132), we get a palindrome (342573375243).

The spelling of 231211263111 in words is "two hundred thirty-one billion, two hundred eleven million, two hundred sixty-three thousand, one hundred eleven".