21442433111 has 6 divisors (see below), whose sum is σ = 23568955536. Its totient is φ = 19493120900.

The previous prime is 21442433063. The next prime is 21442433119. The reversal of 21442433111 is 11133424412.

It is not a de Polignac number, because 21442433111 - 2²⁶ = 21375324247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442433119) 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 5 ways as a sum of consecutive naturals, for example, 88604975 + ... + 88605216.

It is an arithmetic number, because the mean of its divisors is an integer number (3928159256).

Almost surely, 2^21442433111 is an apocalyptic number.

21442433111 is a deficient number, since it is larger than the sum of its proper divisors (2126522425).

21442433111 is a wasteful number, since it uses less digits than its factorization.

21442433111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177210213 (or 177210202 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

Adding to 21442433111 its reverse (11133424412), we get a palindrome (32575857523).

The spelling of 21442433111 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty-three thousand, one hundred eleven".