21224314124 has 96 divisors (see below), whose sum is σ = 41261088960. Its totient is φ = 9493632000.

The previous prime is 21224314099. The next prime is 21224314151. The reversal of 21224314124 is 42141342212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 21224314093 and 21224314102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78900662 + ... + 78900930.

It is an arithmetic number, because the mean of its divisors is an integer number (429803010).

Almost surely, 2^21224314124 is an apocalyptic number.

It is an amenable number.

21224314124 is a deficient number, since it is larger than the sum of its proper divisors (20036774836).

21224314124 is a wasteful number, since it uses less digits than its factorization.

21224314124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 649 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 21224314124 its reverse (42141342212), we get a palindrome (63365656336).

The spelling of 21224314124 in words is "twenty-one billion, two hundred twenty-four million, three hundred fourteen thousand, one hundred twenty-four".