21777171046111 has 32 divisors (see below), whose sum is σ = 23629847205888. Its totient is φ = 19950261189120.

The previous prime is 21777171046093. The next prime is 21777171046121. The reversal of 21777171046111 is 11164017177712.

It is a cyclic number.

It is not a de Polignac number, because 21777171046111 - 2⁹ = 21777171045599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21777171046121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5096457271 + ... + 5096461543.

It is an arithmetic number, because the mean of its divisors is an integer number (738432725184).

Almost surely, 2^{21777171046111} is an apocalyptic number.

21777171046111 is a deficient number, since it is larger than the sum of its proper divisors (1852676159777).

21777171046111 is a wasteful number, since it uses less digits than its factorization.

21777171046111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591.

The product of its (nonzero) digits is 115248, while the sum is 46.

The spelling of 21777171046111 in words is "twenty-one trillion, seven hundred seventy-seven billion, one hundred seventy-one million, forty-six thousand, one hundred eleven".