22144020521 has 4 divisors (see below), whose sum is σ = 25307452032. Its totient is φ = 18980589012.

The previous prime is 22144020499. The next prime is 22144020527. The reversal of 22144020521 is 12502044122.

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 not a de Polignac number, because 22144020521 - 2²⁶ = 22076911657 is a prime.

It is a super-2 number, since 2×22144020521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22144020527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581715745 + ... + 1581715758.

It is an arithmetic number, because the mean of its divisors is an integer number (6326863008).

Almost surely, 2^22144020521 is an apocalyptic number.

It is an amenable number.

22144020521 is a deficient number, since it is larger than the sum of its proper divisors (3163431511).

22144020521 is an equidigital number, since it uses as much as digits as its factorization.

22144020521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163431510.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 22144020521 its reverse (12502044122), we get a palindrome (34646064643).

The spelling of 22144020521 in words is "twenty-two billion, one hundred forty-four million, twenty thousand, five hundred twenty-one".