21365026321101 has 16 divisors (see below), whose sum is σ = 28523241575808. Its totient is φ = 14225081976000.

The previous prime is 21365026321099. The next prime is 21365026321139. The reversal of 21365026321101 is 10112362056312.

It is not a de Polignac number, because 21365026321101 - 2¹ = 21365026321099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365026321141) 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, 103333776 + ... + 103540326.

It is an arithmetic number, because the mean of its divisors is an integer number (1782702598488).

Almost surely, 2^{21365026321101} is an apocalyptic number.

It is an amenable number.

21365026321101 is a deficient number, since it is larger than the sum of its proper divisors (7158215254707).

21365026321101 is a wasteful number, since it uses less digits than its factorization.

21365026321101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250612.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 21365026321101 its reverse (10112362056312), we get a palindrome (31477388377413).

The spelling of 21365026321101 in words is "twenty-one trillion, three hundred sixty-five billion, twenty-six million, three hundred twenty-one thousand, one hundred one".