13111440423021 has 12 divisors (see below), whose sum is σ = 18938780194048. Its totient is φ = 8740945089864.

The previous prime is 13111440423013. The next prime is 13111440423031. The reversal of 13111440423021 is 12032404411131.

It is a happy number.

13111440423021 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 1 + 4 + 404 + 230 + 21 = 666.

It is not a de Polignac number, because 13111440423021 - 2³ = 13111440423013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111440423031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7131636 + ... + 8779698.

Almost surely, 2^{13111440423021} is an apocalyptic number.

It is an amenable number.

13111440423021 is a deficient number, since it is larger than the sum of its proper divisors (5827339771027).

13111440423021 is a wasteful number, since it uses less digits than its factorization.

13111440423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532032 (or 2532029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 13111440423021 its reverse (12032404411131), we get a palindrome (25143844834152).

The spelling of 13111440423021 in words is "thirteen trillion, one hundred eleven billion, four hundred forty million, four hundred twenty-three thousand, twenty-one".