11142221361 has 16 divisors (see below), whose sum is σ = 15862742016. Its totient is φ = 6939945936.

The previous prime is 11142221359. The next prime is 11142221401. The reversal of 11142221361 is 16312224111.

It is not a de Polignac number, because 11142221361 - 2¹ = 11142221359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11142221351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874725 + ... + 1880658.

It is an arithmetic number, because the mean of its divisors is an integer number (991421376).

Almost surely, 2^11142221361 is an apocalyptic number.

It is an amenable number.

11142221361 is a deficient number, since it is larger than the sum of its proper divisors (4720520655).

11142221361 is a wasteful number, since it uses less digits than its factorization.

11142221361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755452.

The product of its digits is 576, while the sum is 24.

Adding to 11142221361 its reverse (16312224111), we get a palindrome (27454445472).

The spelling of 11142221361 in words is "eleven billion, one hundred forty-two million, two hundred twenty-one thousand, three hundred sixty-one".