21013121131311 has 8 divisors (see below), whose sum is σ = 28073642128000. Its totient is φ = 13980673777752.

The previous prime is 21013121131297. The next prime is 21013121131333. The reversal of 21013121131311 is 11313112131012.

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

It is not a de Polignac number, because 21013121131311 - 2⁷ = 21013121131183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013121131111) 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, 7018409035 + ... + 7018412028.

It is an arithmetic number, because the mean of its divisors is an integer number (3509205266000).

Almost surely, 2^{21013121131311} is an apocalyptic number.

21013121131311 is a deficient number, since it is larger than the sum of its proper divisors (7060520996689).

21013121131311 is a wasteful number, since it uses less digits than its factorization.

21013121131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14036821565.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21013121131311 its reverse (11313112131012), we get a palindrome (32326233262323).

The spelling of 21013121131311 in words is "twenty-one trillion, thirteen billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred eleven".