231211141 has 4 divisors (see below), whose sum is σ = 264241312. Its totient is φ = 198180972.

The previous prime is 231211109. The next prime is 231211153. The reversal of 231211141 is 141112132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231211141 - 2⁵ = 231211109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212141) 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, 16515075 + ... + 16515088.

It is an arithmetic number, because the mean of its divisors is an integer number (66060328).

Almost surely, 2^231211141 is an apocalyptic number.

It is an amenable number.

231211141 is a deficient number, since it is larger than the sum of its proper divisors (33030171).

231211141 is an equidigital number, since it uses as much as digits as its factorization.

231211141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33030170.

The product of its digits is 48, while the sum is 16.

The square root of 231211141 is about 15205.6285960167. The cubic root of 231211141 is about 613.7661303786.

Adding to 231211141 its reverse (141112132), we get a palindrome (372323273).

Subtracting from 231211141 its reverse (141112132), we obtain a palindrome (90099009).

The spelling of 231211141 in words is "two hundred thirty-one million, two hundred eleven thousand, one hundred forty-one".