21271335207 has 8 divisors (see below), whose sum is σ = 28535779584. Its totient is φ = 14093890488.

The previous prime is 21271335167. The next prime is 21271335229. The reversal of 21271335207 is 70253317212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21271335207 - 2⁶ = 21271335143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21271335257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21749343 + ... + 21750320.

It is an arithmetic number, because the mean of its divisors is an integer number (3566972448).

Almost surely, 2^21271335207 is an apocalyptic number.

21271335207 is a deficient number, since it is larger than the sum of its proper divisors (7264444377).

21271335207 is a wasteful number, since it uses less digits than its factorization.

21271335207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43499829.

The product of its (nonzero) digits is 17640, while the sum is 33.

The spelling of 21271335207 in words is "twenty-one billion, two hundred seventy-one million, three hundred thirty-five thousand, two hundred seven".