21110201121066 has 8 divisors (see below), whose sum is σ = 42220402242144. Its totient is φ = 7036733707020.

The previous prime is 21110201120999. The next prime is 21110201121067. The reversal of 21110201121066 is 66012110201112.

It is a sphenic number, since it is the product of 3 distinct primes.

21110201121066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21110201121067) 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, 1759183426750 + ... + 1759183426761.

It is an arithmetic number, because the mean of its divisors is an integer number (5277550280268).

Almost surely, 2^{21110201121066} is an apocalyptic number.

21110201121066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21110201121066 is a wasteful number, since it uses less digits than its factorization.

21110201121066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518366853516.

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 21110201121066 its reverse (66012110201112), we get a palindrome (87122311322178).

The spelling of 21110201121066 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, one hundred twenty-one thousand, sixty-six".