231211103 has 2 divisors, whose sum is σ = 231211104. Its totient is φ = 231211102.

The previous prime is 231211091. The next prime is 231211109. The reversal of 231211103 is 301112132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231211103 - 2⁴ = 231211087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231211109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115605551 + 115605552.

It is an arithmetic number, because the mean of its divisors is an integer number (115605552).

Almost surely, 2^231211103 is an apocalyptic number.

231211103 is a deficient number, since it is larger than the sum of its proper divisors (1).

231211103 is an equidigital number, since it uses as much as digits as its factorization.

231211103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 231211103 is about 15205.6273464793. The cubic root of 231211103 is about 613.7660967540.

Adding to 231211103 its reverse (301112132), we get a palindrome (532323235).

The spelling of 231211103 in words is "two hundred thirty-one million, two hundred eleven thousand, one hundred three".