1231121334443 has 96 divisors (see below), whose sum is σ = 1755153017856. Its totient is φ = 838617120000.

The previous prime is 1231121334437. The next prime is 1231121334451. The reversal of 1231121334443 is 3444331211321.

It is not a de Polignac number, because 1231121334443 - 2¹⁸ = 1231121072299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231121334043) 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, 25554488 + ... + 25602618.

It is an arithmetic number, because the mean of its divisors is an integer number (18282843936).

Almost surely, 2^{1231121334443} is an apocalyptic number.

1231121334443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231121334443 is a deficient number, since it is larger than the sum of its proper divisors (524031683413).

1231121334443 is a wasteful number, since it uses less digits than its factorization.

1231121334443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48297 (or 48286 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

Adding to 1231121334443 its reverse (3444331211321), we get a palindrome (4675452545764).

The spelling of 1231121334443 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-one million, three hundred thirty-four thousand, four hundred forty-three".