21161260773006 has 16 divisors (see below), whose sum is σ = 43466373480144. Its totient is φ = 6863111601984.

The previous prime is 21161260772983. The next prime is 21161260773053. The reversal of 21161260773006 is 60037706216112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47660497015 + ... + 47660497458.

It is an arithmetic number, because the mean of its divisors is an integer number (2716648342509).

Almost surely, 2^{21161260773006} is an apocalyptic number.

21161260773006 is an abundant number, since it is smaller than the sum of its proper divisors (22305112707138).

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

21161260773006 is a wasteful number, since it uses less digits than its factorization.

21161260773006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95320994515.

The product of its (nonzero) digits is 127008, while the sum is 42.

Adding to 21161260773006 its reverse (60037706216112), we get a palindrome (81198966989118).

The spelling of 21161260773006 in words is "twenty-one trillion, one hundred sixty-one billion, two hundred sixty million, seven hundred seventy-three thousand, six".