21026267271 has 12 divisors (see below), whose sum is σ = 31418560680. Its totient is φ = 13534148880.

The previous prime is 21026267209. The next prime is 21026267281. The reversal of 21026267271 is 17276262012.

It is a happy number.

21026267271 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 626 + 7 + 27 + 1 = 666.

It is not a de Polignac number, because 21026267271 - 2¹¹ = 21026265223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026267281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40279945 + ... + 40280466.

It is an arithmetic number, because the mean of its divisors is an integer number (2618213390).

Almost surely, 2^21026267271 is an apocalyptic number.

21026267271 is a deficient number, since it is larger than the sum of its proper divisors (10392293409).

21026267271 is a wasteful number, since it uses less digits than its factorization.

21026267271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80560446 (or 80560443 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 21026267271 in words is "twenty-one billion, twenty-six million, two hundred sixty-seven thousand, two hundred seventy-one".