1231341111 has 96 divisors (see below), whose sum is σ = 2465648640. Its totient is φ = 571276800.

The previous prime is 1231341101. The next prime is 1231341121. The reversal of 1231341111 is 1111431321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231341101) and next prime (1231341121).

It is not a de Polignac number, because 1231341111 - 2¹³ = 1231332919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231341101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 277075 + ... + 281483.

It is an arithmetic number, because the mean of its divisors is an integer number (25683840).

Almost surely, 2^1231341111 is an apocalyptic number.

1231341111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231341111 is an abundant number, since it is smaller than the sum of its proper divisors (1234307529).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231341111 is a wasteful number, since it uses less digits than its factorization.

1231341111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477 (or 4474 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1231341111 is about 35090.4703730229. The cubic root of 1231341111 is about 1071.8305379149.

Adding to 1231341111 its reverse (1111431321), we get a palindrome (2342772432).

The spelling of 1231341111 in words is "one billion, two hundred thirty-one million, three hundred forty-one thousand, one hundred eleven".