21442332111 has 8 divisors (see below), whose sum is σ = 28651794864. Its totient is φ = 14263878720.

The previous prime is 21442332077. The next prime is 21442332113. The reversal of 21442332111 is 11123324412.

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

It is not a de Polignac number, because 21442332111 - 2¹⁵ = 21442299343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442332113) 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 7 ways as a sum of consecutive naturals, for example, 7750726 + ... + 7753491.

It is an arithmetic number, because the mean of its divisors is an integer number (3581474358).

Almost surely, 2^21442332111 is an apocalyptic number.

21442332111 is a deficient number, since it is larger than the sum of its proper divisors (7209462753).

21442332111 is a wasteful number, since it uses less digits than its factorization.

21442332111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15504681.

The product of its digits is 1152, while the sum is 24.

Adding to 21442332111 its reverse (11123324412), we get a palindrome (32565656523).

The spelling of 21442332111 in words is "twenty-one billion, four hundred forty-two million, three hundred thirty-two thousand, one hundred eleven".