2121113122 has 4 divisors (see below), whose sum is σ = 3181669686. Its totient is φ = 1060556560.

The previous prime is 2121113101. The next prime is 2121113129. The reversal of 2121113122 is 2213111212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2087484721 + 33628401 = 45689^2 + 5799^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121113096 and 2121113105.

It is not an unprimeable number, because it can be changed into a prime (2121113129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530278279 + ... + 530278282.

Almost surely, 2^2121113122 is an apocalyptic number.

2121113122 is a deficient number, since it is larger than the sum of its proper divisors (1060556564).

2121113122 is a wasteful number, since it uses less digits than its factorization.

2121113122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060556563.

The product of its digits is 48, while the sum is 16.

The square root of 2121113122 is about 46055.5438791032. The cubic root of 2121113122 is about 1284.8564535559.

Adding to 2121113122 its reverse (2213111212), we get a palindrome (4334224334).

The spelling of 2121113122 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred twenty-two".