2121103111 has 16 divisors (see below), whose sum is σ = 2229756160. Its totient is φ = 2015228160.

The previous prime is 2121103093. The next prime is 2121103139. The reversal of 2121103111 is 1113011212.

It is a happy number.

It is not a de Polignac number, because 2121103111 - 2¹⁷ = 2120972039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121103091 and 2121103100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121103511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516181 + ... + 520273.

It is an arithmetic number, because the mean of its divisors is an integer number (139359760).

Almost surely, 2^2121103111 is an apocalyptic number.

2121103111 is a deficient number, since it is larger than the sum of its proper divisors (108653049).

2121103111 is a wasteful number, since it uses less digits than its factorization.

2121103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2121103111 is about 46055.4351949908. The cubic root of 2121103111 is about 1284.8544321773.

Adding to 2121103111 its reverse (1113011212), we get a palindrome (3234114323).

The spelling of 2121103111 in words is "two billion, one hundred twenty-one million, one hundred three thousand, one hundred eleven".