231112001161 has 2 divisors, whose sum is σ = 231112001162. Its totient is φ = 231112001160.

The previous prime is 231112001077. The next prime is 231112001167. The reversal of 231112001161 is 161100211132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154358623225 + 76753377936 = 392885^2 + 277044^2 .

It is a cyclic number.

It is not a de Polignac number, because 231112001161 - 2¹⁵ = 231111968393 is a prime.

It is not a weakly prime, because it can be changed into another prime (231112001167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115556000580 + 115556000581.

It is an arithmetic number, because the mean of its divisors is an integer number (115556000581).

Almost surely, 2^231112001161 is an apocalyptic number.

It is an amenable number.

231112001161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231112001161 is an equidigital number, since it uses as much as digits as its factorization.

231112001161 is an evil number, because the sum of its binary digits is even.

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

Adding to 231112001161 its reverse (161100211132), we get a palindrome (392212212293).

The spelling of 231112001161 in words is "two hundred thirty-one billion, one hundred twelve million, one thousand, one hundred sixty-one".