11872871426721 has 16 divisors (see below), whose sum is σ = 15995983638528. Its totient is φ = 7832665822800.

The previous prime is 11872871426719. The next prime is 11872871426753. The reversal of 11872871426721 is 12762417827811.

It is not a de Polignac number, because 11872871426721 - 2¹ = 11872871426719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11872871426791) 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, 20007865 + ... + 20592726.

It is an arithmetic number, because the mean of its divisors is an integer number (999748977408).

Almost surely, 2^{11872871426721} is an apocalyptic number.

It is an amenable number.

11872871426721 is a deficient number, since it is larger than the sum of its proper divisors (4123112211807).

11872871426721 is a wasteful number, since it uses less digits than its factorization.

11872871426721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40601612.

The product of its digits is 4214784, while the sum is 57.

The spelling of 11872871426721 in words is "eleven trillion, eight hundred seventy-two billion, eight hundred seventy-one million, four hundred twenty-six thousand, seven hundred twenty-one".