21422242144013 has 4 divisors (see below), whose sum is σ = 21507589722528. Its totient is φ = 21336894565500.

The previous prime is 21422242143983. The next prime is 21422242144031. The reversal of 21422242144013 is 31044124222412.

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 21422242144013 - 2³⁰ = 21421168402189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422242144613) 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, 42673788881 + ... + 42673789382.

It is an arithmetic number, because the mean of its divisors is an integer number (5376897430632).

Almost surely, 2^{21422242144013} is an apocalyptic number.

It is an amenable number.

21422242144013 is a deficient number, since it is larger than the sum of its proper divisors (85347578515).

21422242144013 is an equidigital number, since it uses as much as digits as its factorization.

21422242144013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85347578514.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21422242144013 its reverse (31044124222412), we get a palindrome (52466366366425).

The spelling of 21422242144013 in words is "twenty-one trillion, four hundred twenty-two billion, two hundred forty-two million, one hundred forty-four thousand, thirteen".