21301121101 has 8 divisors (see below), whose sum is σ = 23120297984. Its totient is φ = 19507748400.

The previous prime is 21301121069. The next prime is 21301121111. The reversal of 21301121101 is 10112110312.

It is a happy number.

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 21301121101 - 2⁵ = 21301121069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6449325 + ... + 6452626.

It is an arithmetic number, because the mean of its divisors is an integer number (2890037248).

Almost surely, 2^21301121101 is an apocalyptic number.

It is an amenable number.

21301121101 is a deficient number, since it is larger than the sum of its proper divisors (1819176883).

21301121101 is a wasteful number, since it uses less digits than its factorization.

21301121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12902091.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21301121101 its reverse (10112110312), we get a palindrome (31413231413).

The spelling of 21301121101 in words is "twenty-one billion, three hundred one million, one hundred twenty-one thousand, one hundred one".