2111701111506 has 64 divisors (see below), whose sum is σ = 5366288636160. Its totient is φ = 602978878080.

The previous prime is 2111701111493. The next prime is 2111701111511. The reversal of 2111701111506 is 6051111071112.

2111701111506 is a `hidden beast` number, since 21 + 117 + 0 + 11 + 11 + 506 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2111701111506.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1059385 + ... + 2312076.

It is an arithmetic number, because the mean of its divisors is an integer number (83848259940).

Almost surely, 2^{2111701111506} is an apocalyptic number.

2111701111506 is an abundant number, since it is smaller than the sum of its proper divisors (3254587524654).

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

2111701111506 is a wasteful number, since it uses less digits than its factorization.

2111701111506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373136 (or 3373130 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 27.

Adding to 2111701111506 its reverse (6051111071112), we get a palindrome (8162812182618).

The spelling of 2111701111506 in words is "two trillion, one hundred eleven billion, seven hundred one million, one hundred eleven thousand, five hundred six".