1231121334043 has 2 divisors, whose sum is σ = 1231121334044. Its totient is φ = 1231121334042.

The previous prime is 1231121334041. The next prime is 1231121334073. The reversal of 1231121334043 is 3404331211321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231121334043 - 2¹ = 1231121334041 is a prime.

Together with 1231121334041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1231121334041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615560667021 + 615560667022.

It is an arithmetic number, because the mean of its divisors is an integer number (615560667022).

Almost surely, 2^{1231121334043} is an apocalyptic number.

1231121334043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231121334043 is an equidigital number, since it uses as much as digits as its factorization.

1231121334043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1231121334043 its reverse (3404331211321), we get a palindrome (4635452545364).

The spelling of 1231121334043 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-one million, three hundred thirty-four thousand, forty-three".