21113000231 has 8 divisors (see below), whose sum is σ = 21139822080. Its totient is φ = 21086197272.

The previous prime is 21113000221. The next prime is 21113000243. The reversal of 21113000231 is 13200031112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113000231 is a prime.

It is a super-2 number, since 2×21113000231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113000201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4509950 + ... + 4514628.

It is an arithmetic number, because the mean of its divisors is an integer number (2642477760).

Almost surely, 2^21113000231 is an apocalyptic number.

21113000231 is a deficient number, since it is larger than the sum of its proper divisors (26821849).

21113000231 is a wasteful number, since it uses less digits than its factorization.

21113000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9445.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21113000231 its reverse (13200031112), we get a palindrome (34313031343).

The spelling of 21113000231 in words is "twenty-one billion, one hundred thirteen million, two hundred thirty-one", and thus it is an aban number.