11421433441 has 4 divisors (see below), whose sum is σ = 12459745584. Its totient is φ = 10383121300.

The previous prime is 11421433421. The next prime is 11421433511. The reversal of 11421433441 is 14433412411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14433412411 = 11 ⋅1312128401.

It is a cyclic number.

It is not a de Polignac number, because 11421433441 - 2⁹ = 11421432929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11421433411) 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, 519156055 + ... + 519156076.

It is an arithmetic number, because the mean of its divisors is an integer number (3114936396).

Almost surely, 2^11421433441 is an apocalyptic number.

11421433441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11421433441 is a deficient number, since it is larger than the sum of its proper divisors (1038312143).

11421433441 is a wasteful number, since it uses less digits than its factorization.

11421433441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038312142.

The product of its digits is 4608, while the sum is 28.

Adding to 11421433441 its reverse (14433412411), we get a palindrome (25854845852).

The spelling of 11421433441 in words is "eleven billion, four hundred twenty-one million, four hundred thirty-three thousand, four hundred forty-one".