11421444145 has 8 divisors (see below), whose sum is σ = 13708423656. Its totient is φ = 9135361536.

The previous prime is 11421444113. The next prime is 11421444193. The reversal of 11421444145 is 54144412411.

It can be written as a sum of positive squares in 4 ways, for example, as 520204864 + 10901239281 = 22808^2 + 104409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11421444145 - 2⁵ = 11421444113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195882 + ... + 247411.

It is an arithmetic number, because the mean of its divisors is an integer number (1713552957).

Almost surely, 2^11421444145 is an apocalyptic number.

It is an amenable number.

11421444145 is a deficient number, since it is larger than the sum of its proper divisors (2286979511).

11421444145 is an equidigital number, since it uses as much as digits as its factorization.

11421444145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448451.

The product of its digits is 10240, while the sum is 31.

Adding to 11421444145 its reverse (54144412411), we get a palindrome (65565856556).

The spelling of 11421444145 in words is "eleven billion, four hundred twenty-one million, four hundred forty-four thousand, one hundred forty-five".