21443021113 has 16 divisors (see below), whose sum is σ = 22014720000. Its totient is φ = 20880522000.

The previous prime is 21443021101. The next prime is 21443021147. The reversal of 21443021113 is 31112034412.

It is a cyclic number.

It is not a de Polignac number, because 21443021113 - 2²¹ = 21440923961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443025113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2037138 + ... + 2047636.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920000).

Almost surely, 2^21443021113 is an apocalyptic number.

It is an amenable number.

21443021113 is a deficient number, since it is larger than the sum of its proper divisors (571698887).

21443021113 is a wasteful number, since it uses less digits than its factorization.

21443021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10932.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21443021113 its reverse (31112034412), we get a palindrome (52555055525).

The spelling of 21443021113 in words is "twenty-one billion, four hundred forty-three million, twenty-one thousand, one hundred thirteen".