11116413321421 has 4 divisors (see below), whose sum is σ = 11135679202972. Its totient is φ = 11097147439872.

The previous prime is 11116413321413. The next prime is 11116413321427. The reversal of 11116413321421 is 12412331461111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8907771498921 + 2208641822500 = 2984589^2 + 1486150^2 .

It is a cyclic number.

It is not a de Polignac number, because 11116413321421 - 2³ = 11116413321413 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 (11116413321427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9632939910 + ... + 9632941063.

It is an arithmetic number, because the mean of its divisors is an integer number (2783919800743).

Almost surely, 2^{11116413321421} is an apocalyptic number.

It is an amenable number.

11116413321421 is a deficient number, since it is larger than the sum of its proper divisors (19265881551).

11116413321421 is an equidigital number, since it uses as much as digits as its factorization.

11116413321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19265881550.

The product of its digits is 3456, while the sum is 31.

Adding to 11116413321421 its reverse (12412331461111), we get a palindrome (23528744782532).

The spelling of 11116413321421 in words is "eleven trillion, one hundred sixteen billion, four hundred thirteen million, three hundred twenty-one thousand, four hundred twenty-one".