21124124333 has 16 divisors (see below), whose sum is σ = 24156740160. Its totient is φ = 18299225856.

The previous prime is 21124124317. The next prime is 21124124339. The reversal of 21124124333 is 33342142112.

It is a cyclic number.

It is not a de Polignac number, because 21124124333 - 2⁴ = 21124124317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124124339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61043 + ... + 214416.

It is an arithmetic number, because the mean of its divisors is an integer number (1509796260).

Almost surely, 2^21124124333 is an apocalyptic number.

It is an amenable number.

21124124333 is a deficient number, since it is larger than the sum of its proper divisors (3032615827).

21124124333 is a wasteful number, since it uses less digits than its factorization.

21124124333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275836.

The product of its digits is 3456, while the sum is 26.

Adding to 21124124333 its reverse (33342142112), we get a palindrome (54466266445).

The spelling of 21124124333 in words is "twenty-one billion, one hundred twenty-four million, one hundred twenty-four thousand, three hundred thirty-three".