21160522110511 has 24 divisors (see below), whose sum is σ = 25521634013184. Its totient is φ = 17154065881920.

The previous prime is 21160522110503. The next prime is 21160522110527. The reversal of 21160522110511 is 11501122506112.

It is not a de Polignac number, because 21160522110511 - 2³ = 21160522110503 is a prime.

It is a super-2 number, since 2×21160522110511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21160522110511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160522110811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7021135 + ... + 9571696.

It is an arithmetic number, because the mean of its divisors is an integer number (1063401417216).

Almost surely, 2^{21160522110511} is an apocalyptic number.

21160522110511 is a deficient number, since it is larger than the sum of its proper divisors (4361111902673).

21160522110511 is an equidigital number, since it uses as much as digits as its factorization.

21160522110511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593039 (or 16592950 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 21160522110511 its reverse (11501122506112), we get a palindrome (32661644616623).

The spelling of 21160522110511 in words is "twenty-one trillion, one hundred sixty billion, five hundred twenty-two million, one hundred ten thousand, five hundred eleven".