2121211113 has 16 divisors (see below), whose sum is σ = 3307493376. Its totient is φ = 1183931280.

The previous prime is 2121211111. The next prime is 2121211139. The reversal of 2121211113 is 3111121212.

It is not a de Polignac number, because 2121211113 - 2¹ = 2121211111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121211092 and 2121211101.

It is not an unprimeable number, because it can be changed into a prime (2121211111) 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, 1173633 + ... + 1175438.

It is an arithmetic number, because the mean of its divisors is an integer number (206718336).

Almost surely, 2^2121211113 is an apocalyptic number.

It is an amenable number.

2121211113 is a deficient number, since it is larger than the sum of its proper divisors (1186282263).

2121211113 is a wasteful number, since it uses less digits than its factorization.

2121211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349124.

The product of its digits is 24, while the sum is 15.

The square root of 2121211113 is about 46056.6077018271. The cubic root of 2121211113 is about 1284.8762391469.

Adding to 2121211113 its reverse (3111121212), we get a palindrome (5232332325).

The spelling of 2121211113 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred thirteen".