21124234213 has 8 divisors (see below), whose sum is σ = 21703276832. Its totient is φ = 20545618896.

The previous prime is 21124234211. The next prime is 21124234217. The reversal of 21124234213 is 31243242112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21124234213 - 2¹ = 21124234211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124234211) 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, 5295 + ... + 205612.

It is an arithmetic number, because the mean of its divisors is an integer number (2712909604).

Almost surely, 2^21124234213 is an apocalyptic number.

It is an amenable number.

21124234213 is a deficient number, since it is larger than the sum of its proper divisors (579042619).

21124234213 is a wasteful number, since it uses less digits than its factorization.

21124234213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213651.

The product of its digits is 2304, while the sum is 25.

Adding to 21124234213 its reverse (31243242112), we get a palindrome (52367476325).

The spelling of 21124234213 in words is "twenty-one billion, one hundred twenty-four million, two hundred thirty-four thousand, two hundred thirteen".