2131120242 has 12 divisors (see below), whose sum is σ = 4617427230. Its totient is φ = 710373408.

The previous prime is 2131120163. The next prime is 2131120249. The reversal of 2131120242 is 2420211312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2129730201 + 1390041 = 46149^2 + 1179^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 118395569 = 2131120242 / (2 + 1 + 3 + 1 + 1 + 2 + 0 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (2131120249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59197767 + ... + 59197802.

Almost surely, 2^2131120242 is an apocalyptic number.

2131120242 is an abundant number, since it is smaller than the sum of its proper divisors (2486306988).

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

2131120242 is a wasteful number, since it uses less digits than its factorization.

2131120242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118395577 (or 118395574 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2131120242 is about 46164.0579022252. The cubic root of 2131120242 is about 1286.8738762487.

Adding to 2131120242 its reverse (2420211312), we get a palindrome (4551331554).

The spelling of 2131120242 in words is "two billion, one hundred thirty-one million, one hundred twenty thousand, two hundred forty-two".