2123111106 has 24 divisors (see below), whose sum is σ = 4678043760. Its totient is φ = 695708376.

The previous prime is 2123111101. The next prime is 2123111131. The reversal of 2123111106 is 6011113212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2123111101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 998520 + ... + 1000643.

It is an arithmetic number, because the mean of its divisors is an integer number (194918490).

Almost surely, 2^2123111106 is an apocalyptic number.

2123111106 is an abundant number, since it is smaller than the sum of its proper divisors (2554932654).

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

2123111106 is a wasteful number, since it uses less digits than its factorization.

2123111106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999230 (or 1999227 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2123111106 is about 46077.2297995442. The cubic root of 2123111106 is about 1285.2597507676.

Adding to 2123111106 its reverse (6011113212), we get a palindrome (8134224318).

The spelling of 2123111106 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, one hundred six".