21320210101 has 8 divisors (see below), whose sum is σ = 21790792800. Its totient is φ = 20853533040.

The previous prime is 21320210081. The next prime is 21320210113. The reversal of 21320210101 is 10101202312.

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 21320210101 - 2⁵ = 21320210069 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 (21320216101) 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, 965371 + ... + 987208.

It is an arithmetic number, because the mean of its divisors is an integer number (2723849100).

Almost surely, 2^21320210101 is an apocalyptic number.

It is an amenable number.

21320210101 is a deficient number, since it is larger than the sum of its proper divisors (470582699).

21320210101 is a wasteful number, since it uses less digits than its factorization.

21320210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952819.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21320210101 its reverse (10101202312), we get a palindrome (31421412413).

The spelling of 21320210101 in words is "twenty-one billion, three hundred twenty million, two hundred ten thousand, one hundred one".