11115413124421 has 16 divisors (see below), whose sum is σ = 11758024954368. Its totient is φ = 10490741798400.

The previous prime is 11115413124397. The next prime is 11115413124463. The reversal of 11115413124421 is 12442131451111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11115413124421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115413124481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2002605 + ... + 5122621.

It is an arithmetic number, because the mean of its divisors is an integer number (734876559648).

Almost surely, 2^{11115413124421} is an apocalyptic number.

It is an amenable number.

11115413124421 is a deficient number, since it is larger than the sum of its proper divisors (642611829947).

11115413124421 is a wasteful number, since it uses less digits than its factorization.

11115413124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122892.

The product of its digits is 3840, while the sum is 31.

Adding to 11115413124421 its reverse (12442131451111), we get a palindrome (23557544575532).

The spelling of 11115413124421 in words is "eleven trillion, one hundred fifteen billion, four hundred thirteen million, one hundred twenty-four thousand, four hundred twenty-one".