21303402101 has 8 divisors (see below), whose sum is σ = 21477480864. Its totient is φ = 21130013520.

The previous prime is 21303402077. The next prime is 21303402103. The reversal of 21303402101 is 10120430312.

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-21303402101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21303402101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303402103) 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, 110471 + ... + 234116.

It is an arithmetic number, because the mean of its divisors is an integer number (2684685108).

Almost surely, 2^21303402101 is an apocalyptic number.

It is an amenable number.

21303402101 is a deficient number, since it is larger than the sum of its proper divisors (174078763).

21303402101 is a wasteful number, since it uses less digits than its factorization.

21303402101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345091.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21303402101 its reverse (10120430312), we get a palindrome (31423832413).

The spelling of 21303402101 in words is "twenty-one billion, three hundred three million, four hundred two thousand, one hundred one".