21243247093231 has 8 divisors (see below), whose sum is σ = 21249350179200. Its totient is φ = 21237144484440.

The previous prime is 21243247093219. The next prime is 21243247093283. The reversal of 21243247093231 is 13239074234212.

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 21243247093231 - 2⁵ = 21243247093199 is a prime.

It is a super-2 number, since 2×21243247093231² (a number of 27 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 (21243247090231) 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, 101048016 + ... + 101258026.

It is an arithmetic number, because the mean of its divisors is an integer number (2656168772400).

Almost surely, 2^{21243247093231} is an apocalyptic number.

21243247093231 is a deficient number, since it is larger than the sum of its proper divisors (6103085969).

21243247093231 is a wasteful number, since it uses less digits than its factorization.

21243247093231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238589.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 21243247093231 in words is "twenty-one trillion, two hundred forty-three billion, two hundred forty-seven million, ninety-three thousand, two hundred thirty-one".