21272101113 has 16 divisors (see below), whose sum is σ = 28447635456. Its totient is φ = 14139029520.

The previous prime is 21272101099. The next prime is 21272101121. The reversal of 21272101113 is 31110127212.

It is not a de Polignac number, because 21272101113 - 2⁶ = 21272101049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21272101113.

It is not an unprimeable number, because it can be changed into a prime (21272101313) 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 15 ways as a sum of consecutive naturals, for example, 2300806 + ... + 2310032.

It is an arithmetic number, because the mean of its divisors is an integer number (1777977216).

Almost surely, 2^21272101113 is an apocalyptic number.

It is an amenable number.

21272101113 is a deficient number, since it is larger than the sum of its proper divisors (7175534343).

21272101113 is a wasteful number, since it uses less digits than its factorization.

21272101113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11444.

The product of its (nonzero) digits is 168, while the sum is 21.

Adding to 21272101113 its reverse (31110127212), we get a palindrome (52382228325).

The spelling of 21272101113 in words is "twenty-one billion, two hundred seventy-two million, one hundred one thousand, one hundred thirteen".