21161015460044 has 12 divisors (see below), whose sum is σ = 37033022405568. Its totient is φ = 10580151915600.

The previous prime is 21161015460043. The next prime is 21161015460059. The reversal of 21161015460044 is 44006451016112.

It is a junction number, because it is equal to n+sod(n) for n = 21161015459986 and 21161015460013.

It is not an unprimeable number, because it can be changed into a prime (21161015460043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88819772 + ... + 89057699.

It is an arithmetic number, because the mean of its divisors is an integer number (3086085200464).

Almost surely, 2^{21161015460044} is an apocalyptic number.

It is an amenable number.

21161015460044 is a deficient number, since it is larger than the sum of its proper divisors (15872006945524).

21161015460044 is a wasteful number, since it uses less digits than its factorization.

21161015460044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177907216 (or 177907214 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 21161015460044 its reverse (44006451016112), we get a palindrome (65167466476156).

The spelling of 21161015460044 in words is "twenty-one trillion, one hundred sixty-one billion, fifteen million, four hundred sixty thousand, forty-four".