11134440021 has 16 divisors (see below), whose sum is σ = 15664437440. Its totient is φ = 7015559040.

The previous prime is 11134440011. The next prime is 11134440043. The reversal of 11134440021 is 12004443111.

It is not a de Polignac number, because 11134440021 - 2⁵ = 11134439989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11134440021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11134440011) 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, 208000 + ... + 255993.

It is an arithmetic number, because the mean of its divisors is an integer number (979027340).

Almost surely, 2^11134440021 is an apocalyptic number.

It is an amenable number.

11134440021 is a deficient number, since it is larger than the sum of its proper divisors (4529997419).

11134440021 is a wasteful number, since it uses less digits than its factorization.

11134440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464436.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11134440021 its reverse (12004443111), we get a palindrome (23138883132).

The spelling of 11134440021 in words is "eleven billion, one hundred thirty-four million, four hundred forty thousand, twenty-one".