21112057141 has 8 divisors (see below), whose sum is σ = 24620475200. Its totient is φ = 18096048684.

The previous prime is 21112057133. The next prime is 21112057151. The reversal of 21112057141 is 14175021112.

It is a happy number.

It is not a de Polignac number, because 21112057141 - 2³ = 21112057133 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 (21112057151) 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, 30775251 + ... + 30775936.

It is an arithmetic number, because the mean of its divisors is an integer number (3077559400).

Almost surely, 2^21112057141 is an apocalyptic number.

It is an amenable number.

21112057141 is a deficient number, since it is larger than the sum of its proper divisors (3508418059).

21112057141 is an frugal number, since it uses more digits than its factorization.

21112057141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61551208 (or 61551194 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 21112057141 its reverse (14175021112), we get a palindrome (35287078253).

The spelling of 21112057141 in words is "twenty-one billion, one hundred twelve million, fifty-seven thousand, one hundred forty-one".