231212141 has 2 divisors, whose sum is σ = 231212142. Its totient is φ = 231212140.

The previous prime is 231212071. The next prime is 231212153. The reversal of 231212141 is 141212132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223622116 + 7590025 = 14954^2 + 2755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231212141 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115606070 + 115606071.

It is an arithmetic number, because the mean of its divisors is an integer number (115606071).

Almost surely, 2^231212141 is an apocalyptic number.

It is an amenable number.

231212141 is a deficient number, since it is larger than the sum of its proper divisors (1).

231212141 is an equidigital number, since it uses as much as digits as its factorization.

231212141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 231212141 is about 15205.6614785415. The cubic root of 231212141 is about 613.7670152339.

Adding to 231212141 its reverse (141212132), we get a palindrome (372424273).

Subtracting from 231212141 its reverse (141212132), we obtain a palindrome (90000009).

The spelling of 231212141 in words is "two hundred thirty-one million, two hundred twelve thousand, one hundred forty-one".