21067601271 has 16 divisors (see below), whose sum is σ = 30701933568. Its totient is φ = 12792470400.

The previous prime is 21067601239. The next prime is 21067601323. The reversal of 21067601271 is 17210676012.

It is not a de Polignac number, because 21067601271 - 2⁵ = 21067601239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21067601671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6661165 + ... + 6664326.

It is an arithmetic number, because the mean of its divisors is an integer number (1918870848).

Almost surely, 2^21067601271 is an apocalyptic number.

21067601271 is a deficient number, since it is larger than the sum of its proper divisors (9634332297).

21067601271 is a wasteful number, since it uses less digits than its factorization.

21067601271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13325542.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 21067601271 in words is "twenty-one billion, sixty-seven million, six hundred one thousand, two hundred seventy-one".