81101211210118 has 16 divisors (see below), whose sum is σ = 135947928327120. Its totient is φ = 35965060403200.

The previous prime is 81101211210079. The next prime is 81101211210161.

81101211210118 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44956324603 + ... + 44956326406.

It is an arithmetic number, because the mean of its divisors is an integer number (8496745520445).

Almost surely, 2^{81101211210118} is an apocalyptic number.

81101211210118 is a deficient number, since it is larger than the sum of its proper divisors (54846717117002).

81101211210118 is a wasteful number, since it uses less digits than its factorization.

81101211210118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89912651063.

The product of its (nonzero) digits is 256, while the sum is 28.

It can be divided in two parts, 8110121 and 1210118, that added together give a palindrome (9320239).

The spelling of 81101211210118 in words is "eighty-one trillion, one hundred one billion, two hundred eleven million, two hundred ten thousand, one hundred eighteen".