21422234042 has 8 divisors (see below), whose sum is σ = 35054564832. Its totient is φ = 9737379100.

The previous prime is 21422234039. The next prime is 21422234047. The reversal of 21422234042 is 24043222412.

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

It is a super-2 number, since 2×21422234042² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21422234047) 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, 486868934 + ... + 486868977.

It is an arithmetic number, because the mean of its divisors is an integer number (4381820604).

Almost surely, 2^21422234042 is an apocalyptic number.

21422234042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21422234042 is a deficient number, since it is larger than the sum of its proper divisors (13632330790).

21422234042 is a wasteful number, since it uses less digits than its factorization.

21422234042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973737924.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21422234042 its reverse (24043222412), we get a palindrome (45465456454).

The spelling of 21422234042 in words is "twenty-one billion, four hundred twenty-two million, two hundred thirty-four thousand, forty-two".