21202111101 has 8 divisors (see below), whose sum is σ = 28958981184. Its totient is φ = 13789990880.

The previous prime is 21202111081. The next prime is 21202111111. The reversal of 21202111101 is 10111120212.

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 21202111101 - 2⁵ = 21202111069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86187321 + ... + 86187566.

It is an arithmetic number, because the mean of its divisors is an integer number (3619872648).

Almost surely, 2^21202111101 is an apocalyptic number.

It is an amenable number.

21202111101 is a deficient number, since it is larger than the sum of its proper divisors (7756870083).

21202111101 is a wasteful number, since it uses less digits than its factorization.

21202111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172374931.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21202111101 its reverse (10111120212), we get a palindrome (31313231313).

The spelling of 21202111101 in words is "twenty-one billion, two hundred two million, one hundred eleven thousand, one hundred one".