2120040242 has 16 divisors (see below), whose sum is σ = 3210154200. Its totient is φ = 1050028032.

The previous prime is 2120040239. The next prime is 2120040257. The reversal of 2120040242 is 2420400212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 767345401 + 1352694841 = 27701^2 + 36779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2120040242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101618 + ... + 120690.

Almost surely, 2^2120040242 is an apocalyptic number.

2120040242 is a deficient number, since it is larger than the sum of its proper divisors (1090113958).

2120040242 is a wasteful number, since it uses less digits than its factorization.

2120040242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2120040242 is about 46043.8947310064. The cubic root of 2120040242 is about 1284.6397859861.

Adding to 2120040242 its reverse (2420400212), we get a palindrome (4540440454).

The spelling of 2120040242 in words is "two billion, one hundred twenty million, forty thousand, two hundred forty-two".