2120312113 has 4 divisors (see below), whose sum is σ = 2121593380. Its totient is φ = 2119030848.

The previous prime is 2120312099. The next prime is 2120312123. The reversal of 2120312113 is 3112130212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1520454049 + 599858064 = 38993^2 + 24492^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120312113 - 2⁹ = 2120311601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120312123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638148 + ... + 641461.

It is an arithmetic number, because the mean of its divisors is an integer number (530398345).

Almost surely, 2^2120312113 is an apocalyptic number.

It is an amenable number.

2120312113 is a deficient number, since it is larger than the sum of its proper divisors (1281267).

2120312113 is a wasteful number, since it uses less digits than its factorization.

2120312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281266.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2120312113 is about 46046.8469387427. The cubic root of 2120312113 is about 1284.6946971096.

Adding to 2120312113 its reverse (3112130212), we get a palindrome (5232442325).

The spelling of 2120312113 in words is "two billion, one hundred twenty million, three hundred twelve thousand, one hundred thirteen".