21033042124 has 48 divisors (see below), whose sum is σ = 39471546240. Its totient is φ = 9771632640.

The previous prime is 21033042061. The next prime is 21033042133. The reversal of 21033042124 is 42124033012.

It is a junction number, because it is equal to n+sod(n) for n = 21033042095 and 21033042104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4579069 + ... + 4583659.

It is an arithmetic number, because the mean of its divisors is an integer number (822323880).

Almost surely, 2^21033042124 is an apocalyptic number.

It is an amenable number.

21033042124 is a deficient number, since it is larger than the sum of its proper divisors (18438504116).

21033042124 is a wasteful number, since it uses less digits than its factorization.

21033042124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458 (or 5456 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21033042124 its reverse (42124033012), we get a palindrome (63157075136).

The spelling of 21033042124 in words is "twenty-one billion, thirty-three million, forty-two thousand, one hundred twenty-four".