21727272311 has 4 divisors (see below), whose sum is σ = 22257205824. Its totient is φ = 21197338800.

The previous prime is 21727272289. The next prime is 21727272353. The reversal of 21727272311 is 11327272712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21727272311 - 2²² = 21723078007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21727272361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264966695 + ... + 264966776.

It is an arithmetic number, because the mean of its divisors is an integer number (5564301456).

Almost surely, 2^21727272311 is an apocalyptic number.

21727272311 is a deficient number, since it is larger than the sum of its proper divisors (529933513).

21727272311 is an equidigital number, since it uses as much as digits as its factorization.

21727272311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529933512.

The product of its digits is 16464, while the sum is 35.

The spelling of 21727272311 in words is "twenty-one billion, seven hundred twenty-seven million, two hundred seventy-two thousand, three hundred eleven".