21433220124 has 48 divisors (see below), whose sum is σ = 52052891520. Its totient is φ = 6855710400.

The previous prime is 21433220111. The next prime is 21433220131. The reversal of 21433220124 is 42102233412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21433220094 and 21433220103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132202 + ... + 245649.

It is an arithmetic number, because the mean of its divisors is an integer number (1084435240).

Almost surely, 2^21433220124 is an apocalyptic number.

It is an amenable number.

21433220124 is an abundant number, since it is smaller than the sum of its proper divisors (30619671396).

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

21433220124 is a wasteful number, since it uses less digits than its factorization.

21433220124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378050 (or 378048 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21433220124 its reverse (42102233412), we get a palindrome (63535453536).

The spelling of 21433220124 in words is "twenty-one billion, four hundred thirty-three million, two hundred twenty thousand, one hundred twenty-four".