21113003313 has 24 divisors (see below), whose sum is σ = 32565861120. Its totient is φ = 13151587680.

The previous prime is 21113003299. The next prime is 21113003323. The reversal of 21113003313 is 31330031112.

It is a happy number.

21113003313 is a `hidden beast` number, since 21 + 11 + 300 + 331 + 3 = 666.

It is not a de Polignac number, because 21113003313 - 2¹³ = 21112995121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113003323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1296631 + ... + 1312812.

It is an arithmetic number, because the mean of its divisors is an integer number (1356910880).

Almost surely, 2^21113003313 is an apocalyptic number.

It is an amenable number.

21113003313 is a deficient number, since it is larger than the sum of its proper divisors (11452857807).

21113003313 is a wasteful number, since it uses less digits than its factorization.

21113003313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609509 (or 2609506 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21113003313 its reverse (31330031112), we get a palindrome (52443034425).

The spelling of 21113003313 in words is "twenty-one billion, one hundred thirteen million, three thousand, three hundred thirteen".