21321401101 has 16 divisors (see below), whose sum is σ = 28627337088. Its totient is φ = 15336072000.

The previous prime is 21321401099. The next prime is 21321401113. The reversal of 21321401101 is 10110412312.

It is a cyclic number.

It is not a de Polignac number, because 21321401101 - 2¹ = 21321401099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321401191) 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 15 ways as a sum of consecutive naturals, for example, 10649050 + ... + 10651051.

It is an arithmetic number, because the mean of its divisors is an integer number (1789208568).

Almost surely, 2^21321401101 is an apocalyptic number.

It is an amenable number.

21321401101 is a deficient number, since it is larger than the sum of its proper divisors (7305935987).

21321401101 is a wasteful number, since it uses less digits than its factorization.

21321401101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21300132.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21321401101 its reverse (10110412312), we get a palindrome (31431813413).

The spelling of 21321401101 in words is "twenty-one billion, three hundred twenty-one million, four hundred one thousand, one hundred one".