21040304223313 has 8 divisors (see below), whose sum is σ = 21063477427200. Its totient is φ = 21017131626528.

The previous prime is 21040304223299. The next prime is 21040304223343. The reversal of 21040304223313 is 31332240304012.

It is a happy number.

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-21040304223313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21040304223343) 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, 137767248 + ... + 137919886.

It is an arithmetic number, because the mean of its divisors is an integer number (2632934678400).

Almost surely, 2^{21040304223313} is an apocalyptic number.

It is an amenable number.

21040304223313 is a deficient number, since it is larger than the sum of its proper divisors (23173203887).

21040304223313 is a wasteful number, since it uses less digits than its factorization.

21040304223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303551.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21040304223313 its reverse (31332240304012), we get a palindrome (52372544527325).

The spelling of 21040304223313 in words is "twenty-one trillion, forty billion, three hundred four million, two hundred twenty-three thousand, three hundred thirteen".