21422042331 has 8 divisors (see below), whose sum is σ = 28630569744. Its totient is φ = 14247438240.

The previous prime is 21422042303. The next prime is 21422042339. The reversal of 21422042331 is 13324022412.

It is a happy number.

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

It is not a de Polignac number, because 21422042331 - 2⁷ = 21422042203 is a prime.

It is a super-2 number, since 2×21422042331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21422042339) 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, 8479356 + ... + 8481881.

It is an arithmetic number, because the mean of its divisors is an integer number (3578821218).

Almost surely, 2^21422042331 is an apocalyptic number.

21422042331 is a deficient number, since it is larger than the sum of its proper divisors (7208527413).

21422042331 is a wasteful number, since it uses less digits than its factorization.

21422042331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16961661.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21422042331 its reverse (13324022412), we get a palindrome (34746064743).

The spelling of 21422042331 in words is "twenty-one billion, four hundred twenty-two million, forty-two thousand, three hundred thirty-one".