231201123010111 has 16 divisors (see below), whose sum is σ = 238608249030144. Its totient is φ = 223948049359104.

The previous prime is 231201123010093. The next prime is 231201123010147. The reversal of 231201123010111 is 111010321102132.

It is a cyclic number.

It is not a de Polignac number, because 231201123010111 - 2⁹ = 231201123009599 is a prime.

It is a super-2 number, since 2×231201123010111² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201127010111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133330455 + ... + 135053368.

It is an arithmetic number, because the mean of its divisors is an integer number (14913015564384).

Almost surely, 2^{231201123010111} is an apocalyptic number.

231201123010111 is a deficient number, since it is larger than the sum of its proper divisors (7407126020033).

231201123010111 is a wasteful number, since it uses less digits than its factorization.

231201123010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268384110.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 231201123010111 its reverse (111010321102132), we get a palindrome (342211444112243).

The spelling of 231201123010111 in words is "two hundred thirty-one trillion, two hundred one billion, one hundred twenty-three million, ten thousand, one hundred eleven".