21013321321101 has 16 divisors (see below), whose sum is σ = 28785272107968. Its totient is φ = 13625396064000.

The previous prime is 21013321321099. The next prime is 21013321321123. The reversal of 21013321321101 is 10112312331012.

It is not a de Polignac number, because 21013321321101 - 2¹ = 21013321321099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013321323101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33482235 + ... + 34104056.

It is an arithmetic number, because the mean of its divisors is an integer number (1799079506748).

Almost surely, 2^{21013321321101} is an apocalyptic number.

It is an amenable number.

21013321321101 is a deficient number, since it is larger than the sum of its proper divisors (7771950786867).

21013321321101 is a wasteful number, since it uses less digits than its factorization.

21013321321101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67589132.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21013321321101 its reverse (10112312331012), we get a palindrome (31125633652113).

The spelling of 21013321321101 in words is "twenty-one trillion, thirteen billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred one".