21061116150444 has 36 divisors (see below), whose sum is σ = 53248592176416. Its totient is φ = 7018951725408.

The previous prime is 21061116150427. The next prime is 21061116150479. The reversal of 21061116150444 is 44405161116012.

21061116150444 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 1 + 1 + 161 + 50 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21061116150444² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21061116150399 and 21061116150408.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58999779 + ... + 59355674.

It is an arithmetic number, because the mean of its divisors is an integer number (1479127560456).

Almost surely, 2^{21061116150444} is an apocalyptic number.

It is an amenable number.

21061116150444 is an abundant number, since it is smaller than the sum of its proper divisors (32187476025972).

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

21061116150444 is a wasteful number, since it uses less digits than its factorization.

21061116150444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118360406 (or 118360401 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

Adding to 21061116150444 its reverse (44405161116012), we get a palindrome (65466277266456).

The spelling of 21061116150444 in words is "twenty-one trillion, sixty-one billion, one hundred sixteen million, one hundred fifty thousand, four hundred forty-four".