21271126848 has 112 divisors (see below), whose sum is σ = 60360275520. Its totient is φ = 6590398464.

The previous prime is 21271126847. The next prime is 21271126859. The reversal of 21271126848 is 84862117212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21271126847) 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, 138336 + ... + 248352.

Almost surely, 2^21271126848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21271126848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30180137760).

21271126848 is an abundant number, since it is smaller than the sum of its proper divisors (39089148672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21271126848 is a wasteful number, since it uses less digits than its factorization.

21271126848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110104 (or 110094 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The spelling of 21271126848 in words is "twenty-one billion, two hundred seventy-one million, one hundred twenty-six thousand, eight hundred forty-eight".