1231423355541 has 48 divisors (see below), whose sum is σ = 1804893278400. Its totient is φ = 745771149312.

The previous prime is 1231423355521. The next prime is 1231423355563. The reversal of 1231423355541 is 1455533241321.

It is not a de Polignac number, because 1231423355541 - 2¹⁰ = 1231423354517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231423355541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231423355501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104060961 + ... + 104072793.

It is an arithmetic number, because the mean of its divisors is an integer number (37601943300).

Almost surely, 2^{1231423355541} is an apocalyptic number.

It is an amenable number.

1231423355541 is a deficient number, since it is larger than the sum of its proper divisors (573469922859).

1231423355541 is a wasteful number, since it uses less digits than its factorization.

1231423355541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16038 (or 16021 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

Adding to 1231423355541 its reverse (1455533241321), we get a palindrome (2686956596862).

The spelling of 1231423355541 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-three million, three hundred fifty-five thousand, five hundred forty-one".