21310140221 has 8 divisors (see below), whose sum is σ = 21661854624. Its totient is φ = 20958502320.

The previous prime is 21310140127. The next prime is 21310140239. The reversal of 21310140221 is 12204101312.

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-21310140221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21310140221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310140721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914906 + ... + 937908.

It is an arithmetic number, because the mean of its divisors is an integer number (2707731828).

Almost surely, 2^21310140221 is an apocalyptic number.

It is an amenable number.

21310140221 is a deficient number, since it is larger than the sum of its proper divisors (351714403).

21310140221 is a wasteful number, since it uses less digits than its factorization.

21310140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38251.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21310140221 its reverse (12204101312), we get a palindrome (33514241533).

The spelling of 21310140221 in words is "twenty-one billion, three hundred ten million, one hundred forty thousand, two hundred twenty-one".