21122134442 has 8 divisors (see below), whose sum is σ = 31688784036. Its totient is φ = 10559206432.

The previous prime is 21122134403. The next prime is 21122134459. The reversal of 21122134442 is 24443122112.

It can be written as a sum of positive squares in 2 ways, for example, as 16456014961 + 4666119481 = 128281^2 + 68309^2 .

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

It is a super-2 number, since 2×21122134442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916163 + ... + 938934.

Almost surely, 2^21122134442 is an apocalyptic number.

21122134442 is a deficient number, since it is larger than the sum of its proper divisors (10566649594).

21122134442 is a wasteful number, since it uses less digits than its factorization.

21122134442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860792.

The product of its digits is 3072, while the sum is 26.

Adding to 21122134442 its reverse (24443122112), we get a palindrome (45565256554).

The spelling of 21122134442 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty-four thousand, four hundred forty-two".