1231134043443 has 4 divisors (see below), whose sum is σ = 1641512057928. Its totient is φ = 820756028960.

The previous prime is 1231134043417. The next prime is 1231134043453. The reversal of 1231134043443 is 3443404311321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231134043443 - 2²⁵ = 1231100489011 is a prime.

It is a super-2 number, since 2×1231134043443² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231134043453) 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, 205189007238 + ... + 205189007243.

It is an arithmetic number, because the mean of its divisors is an integer number (410378014482).

Almost surely, 2^{1231134043443} is an apocalyptic number.

1231134043443 is a deficient number, since it is larger than the sum of its proper divisors (410378014485).

1231134043443 is an equidigital number, since it uses as much as digits as its factorization.

1231134043443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410378014484.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 1231134043443 its reverse (3443404311321), we get a palindrome (4674538354764).

The spelling of 1231134043443 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-four million, forty-three thousand, four hundred forty-three".