21320010101 has 8 divisors (see below), whose sum is σ = 23014813920. Its totient is φ = 19633035312.

The previous prime is 21320010079. The next prime is 21320010113. The reversal of 21320010101 is 10101002312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320010101 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 (21320010121) 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, 1951595 + ... + 1962488.

It is an arithmetic number, because the mean of its divisors is an integer number (2876851740).

Almost surely, 2^21320010101 is an apocalyptic number.

It is an amenable number.

21320010101 is a deficient number, since it is larger than the sum of its proper divisors (1694803819).

21320010101 is a wasteful number, since it uses less digits than its factorization.

21320010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914515.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21320010101 its reverse (10101002312), we get a palindrome (31421012413).

The spelling of 21320010101 in words is "twenty-one billion, three hundred twenty million, ten thousand, one hundred one".