11211311441 has 4 divisors (see below), whose sum is σ = 12230521584. Its totient is φ = 10192101300.

The previous prime is 11211311431. The next prime is 11211311443. The reversal of 11211311441 is 14411311211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11211311441 - 2²⁶ = 11144202577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211311443) 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, 509605055 + ... + 509605076.

It is an arithmetic number, because the mean of its divisors is an integer number (3057630396).

Almost surely, 2^11211311441 is an apocalyptic number.

11211311441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211311441 is a deficient number, since it is larger than the sum of its proper divisors (1019210143).

11211311441 is a wasteful number, since it uses less digits than its factorization.

11211311441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019210142.

The product of its digits is 96, while the sum is 20.

Adding to 11211311441 its reverse (14411311211), we get a palindrome (25622622652).

The spelling of 11211311441 in words is "eleven billion, two hundred eleven million, three hundred eleven thousand, four hundred forty-one".