11420144021 has 8 divisors (see below), whose sum is σ = 13416672864. Its totient is φ = 9583337520.

The previous prime is 11420143997. The next prime is 11420144039. The reversal of 11420144021 is 12044102411.

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 11420144021 - 2²⁶ = 11353035157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11420143984 and 11420144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11420144041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39930431 + ... + 39930716.

It is an arithmetic number, because the mean of its divisors is an integer number (1677084108).

Almost surely, 2^11420144021 is an apocalyptic number.

11420144021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11420144021 is a deficient number, since it is larger than the sum of its proper divisors (1996528843).

11420144021 is a wasteful number, since it uses less digits than its factorization.

11420144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79861171.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11420144021 its reverse (12044102411), we get a palindrome (23464246432).

The spelling of 11420144021 in words is "eleven billion, four hundred twenty million, one hundred forty-four thousand, twenty-one".