21142112024 has 32 divisors (see below), whose sum is σ = 43649409600. Its totient is φ = 9520233120.

The previous prime is 21142112011. The next prime is 21142112027. The reversal of 21142112024 is 42021124112.

It is a junction number, because it is equal to n+sod(n) for n = 21142111987 and 21142112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142112027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113254 + ... + 1132085.

It is an arithmetic number, because the mean of its divisors is an integer number (1364044050).

Almost surely, 2^21142112024 is an apocalyptic number.

It is an amenable number.

21142112024 is an abundant number, since it is smaller than the sum of its proper divisors (22507297576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142112024 is a wasteful number, since it uses less digits than its factorization.

21142112024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245463 (or 2245459 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21142112024 its reverse (42021124112), we get a palindrome (63163236136).

The spelling of 21142112024 in words is "twenty-one billion, one hundred forty-two million, one hundred twelve thousand, twenty-four".