21011013121313 has 8 divisors (see below), whose sum is σ = 21022715712960. Its totient is φ = 20999311075120.

The previous prime is 21011013121303. The next prime is 21011013121339. The reversal of 21011013121313 is 31312131011012.

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 21011013121313 - 2⁴ = 21011013121297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011013121303) 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, 95412428 + ... + 95632386.

It is an arithmetic number, because the mean of its divisors is an integer number (2627839464120).

Almost surely, 2^{21011013121313} is an apocalyptic number.

It is an amenable number.

21011013121313 is a deficient number, since it is larger than the sum of its proper divisors (11702591647).

21011013121313 is a wasteful number, since it uses less digits than its factorization.

21011013121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272727.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 21011013121313 its reverse (31312131011012), we get a palindrome (52323144132325).

The spelling of 21011013121313 in words is "twenty-one trillion, eleven billion, thirteen million, one hundred twenty-one thousand, three hundred thirteen".