231001233123181 has 2 divisors, whose sum is σ = 231001233123182. Its totient is φ = 231001233123180.

The previous prime is 231001233123119. The next prime is 231001233123211. The reversal of 231001233123181 is 181321332100132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132032739302500 + 98968493820681 = 11490550^2 + 9948291^2 .

It is a cyclic number.

It is not a de Polignac number, because 231001233123181 - 2¹¹ = 231001233121133 is a prime.

It is a super-2 number, since 2×231001233123181² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231001236123181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500616561590 + 115500616561591.

It is an arithmetic number, because the mean of its divisors is an integer number (115500616561591).

Almost surely, 2^{231001233123181} is an apocalyptic number.

It is an amenable number.

231001233123181 is a deficient number, since it is larger than the sum of its proper divisors (1).

231001233123181 is an equidigital number, since it uses as much as digits as its factorization.

231001233123181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 231001233123181 in words is "two hundred thirty-one trillion, one billion, two hundred thirty-three million, one hundred twenty-three thousand, one hundred eighty-one".