21120323313 has 8 divisors (see below), whose sum is σ = 28921523968. Its totient is φ = 13699669104.

The previous prime is 21120323249. The next prime is 21120323339. The reversal of 21120323313 is 31332302112.

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

It is not a de Polignac number, because 21120323313 - 2⁶ = 21120323249 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 21120323313.

It is not an unprimeable number, because it can be changed into a prime (21120303313) 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, 95136481 + ... + 95136702.

It is an arithmetic number, because the mean of its divisors is an integer number (3615190496).

Almost surely, 2^21120323313 is an apocalyptic number.

It is an amenable number.

21120323313 is a deficient number, since it is larger than the sum of its proper divisors (7801200655).

21120323313 is a wasteful number, since it uses less digits than its factorization.

21120323313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190273223.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21120323313 its reverse (31332302112), we get a palindrome (52452625425).

The spelling of 21120323313 in words is "twenty-one billion, one hundred twenty million, three hundred twenty-three thousand, three hundred thirteen".