21301201111 has 8 divisors (see below), whose sum is σ = 21546467840. Its totient is φ = 21057146208.

The previous prime is 21301201073. The next prime is 21301201121. The reversal of 21301201111 is 11110210312.

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 21301201111 - 2⁷ = 21301200983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21301201091 and 21301201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301201121) 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, 267576 + ... + 337933.

It is an arithmetic number, because the mean of its divisors is an integer number (2693308480).

Almost surely, 2^21301201111 is an apocalyptic number.

21301201111 is a deficient number, since it is larger than the sum of its proper divisors (245266729).

21301201111 is a wasteful number, since it uses less digits than its factorization.

21301201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605913.

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

Adding to 21301201111 its reverse (11110210312), we get a palindrome (32411411423).

The spelling of 21301201111 in words is "twenty-one billion, three hundred one million, two hundred one thousand, one hundred eleven".