2801112111081 has 80 divisors (see below), whose sum is σ = 4349030400000. Its totient is φ = 1795378584672.

The previous prime is 2801112111073. The next prime is 2801112111097. The reversal of 2801112111081 is 1801112111082.

It is not a de Polignac number, because 2801112111081 - 2³ = 2801112111073 is a prime.

It is a super-3 number, since 3×2801112111081³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2801112111041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 373527670 + ... + 373535168.

It is an arithmetic number, because the mean of its divisors is an integer number (54362880000).

Almost surely, 2^{2801112111081} is an apocalyptic number.

It is an amenable number.

2801112111081 is a deficient number, since it is larger than the sum of its proper divisors (1547918288919).

2801112111081 is a wasteful number, since it uses less digits than its factorization.

2801112111081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280 (or 9271 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 27.

Subtracting from 2801112111081 its reverse (1801112111082), we obtain a palindrome (999999999999).

The spelling of 2801112111081 in words is "two trillion, eight hundred one billion, one hundred twelve million, one hundred eleven thousand, eighty-one".