11134121221 has 12 divisors (see below), whose sum is σ = 11818554912. Its totient is φ = 10469444744.

The previous prime is 11134121213. The next prime is 11134121261. The reversal of 11134121221 is 12212143111.

It is not a de Polignac number, because 11134121221 - 2³ = 11134121213 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 (11134121261) 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, 10530 + ... + 149596.

It is an arithmetic number, because the mean of its divisors is an integer number (984879576).

Almost surely, 2^11134121221 is an apocalyptic number.

It is an amenable number.

11134121221 is a deficient number, since it is larger than the sum of its proper divisors (684433691).

11134121221 is an equidigital number, since it uses as much as digits as its factorization.

11134121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139208 (or 139149 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 11134121221 its reverse (12212143111), we get a palindrome (23346264332).

It can be divided in two parts, 11134 and 121221, that added together give a triangular number (132355 = T₅₁₄).

The spelling of 11134121221 in words is "eleven billion, one hundred thirty-four million, one hundred twenty-one thousand, two hundred twenty-one".