21033111313 has 8 divisors (see below), whose sum is σ = 21108447360. Its totient is φ = 20957825280.

The previous prime is 21033111311. The next prime is 21033111343. The reversal of 21033111313 is 31311133012.

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 21033111313 - 2¹ = 21033111311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033111311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964828 + ... + 986386.

It is an arithmetic number, because the mean of its divisors is an integer number (2638555920).

Almost surely, 2^21033111313 is an apocalyptic number.

It is an amenable number.

21033111313 is a deficient number, since it is larger than the sum of its proper divisors (75336047).

21033111313 is a wasteful number, since it uses less digits than its factorization.

21033111313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25007.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21033111313 its reverse (31311133012), we get a palindrome (52344244325).

The spelling of 21033111313 in words is "twenty-one billion, thirty-three million, one hundred eleven thousand, three hundred thirteen".