21179887776011 has 2 divisors, whose sum is σ = 21179887776012. Its totient is φ = 21179887776010.

The previous prime is 21179887775957. The next prime is 21179887776017. The reversal of 21179887776011 is 11067778897112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21179887776011 - 2⁶ = 21179887775947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21179887776017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10589943888005 + 10589943888006.

It is an arithmetic number, because the mean of its divisors is an integer number (10589943888006).

Almost surely, 2^{21179887776011} is an apocalyptic number.

21179887776011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21179887776011 is an equidigital number, since it uses as much as digits as its factorization.

21179887776011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16595712, while the sum is 65.

The spelling of 21179887776011 in words is "twenty-one trillion, one hundred seventy-nine billion, eight hundred eighty-seven million, seven hundred seventy-six thousand, eleven".