1231234131 has 8 divisors (see below), whose sum is σ = 1641921424. Its totient is φ = 820684800.

The previous prime is 1231234117. The next prime is 1231234157. The reversal of 1231234131 is 1314321321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231234131 - 2⁷ = 1231234003 is a prime.

It is a super-2 number, since 2×1231234131² = 3031874970678650322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231234098 and 1231234107.

It is not an unprimeable number, because it can be changed into a prime (1231234111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11470 + ... + 50931.

It is an arithmetic number, because the mean of its divisors is an integer number (205240178).

Almost surely, 2^1231234131 is an apocalyptic number.

1231234131 is a deficient number, since it is larger than the sum of its proper divisors (410687293).

1231234131 is an equidigital number, since it uses as much as digits as its factorization.

1231234131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68981.

The product of its digits is 432, while the sum is 21.

The square root of 1231234131 is about 35088.9459944296. The cubic root of 1231234131 is about 1071.7994964890.

Adding to 1231234131 its reverse (1314321321), we get a palindrome (2545555452).

The spelling of 1231234131 in words is "one billion, two hundred thirty-one million, two hundred thirty-four thousand, one hundred thirty-one".