11541422321 has 16 divisors (see below), whose sum is σ = 13925623488. Its totient is φ = 9423345600.

The previous prime is 11541422317. The next prime is 11541422327. The reversal of 11541422321 is 12322414511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11541422321 - 2² = 11541422317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11541422327) 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, 1085375 + ... + 1095956.

It is an arithmetic number, because the mean of its divisors is an integer number (870351468).

Almost surely, 2^11541422321 is an apocalyptic number.

11541422321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11541422321 is a deficient number, since it is larger than the sum of its proper divisors (2384201167).

11541422321 is a wasteful number, since it uses less digits than its factorization.

11541422321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181392.

The product of its digits is 1920, while the sum is 26.

Adding to 11541422321 its reverse (12322414511), we get a palindrome (23863836832).

The spelling of 11541422321 in words is "eleven billion, five hundred forty-one million, four hundred twenty-two thousand, three hundred twenty-one".