2121242042 has 16 divisors (see below), whose sum is σ = 3439854240. Its totient is φ = 977641488.

The previous prime is 2121242041. The next prime is 2121242059. The reversal of 2121242042 is 2402421212.

It is not an unprimeable number, because it can be changed into a prime (2121242041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752948 + ... + 755759.

It is an arithmetic number, because the mean of its divisors is an integer number (214990890).

Almost surely, 2^2121242042 is an apocalyptic number.

2121242042 is a deficient number, since it is larger than the sum of its proper divisors (1318612198).

2121242042 is a wasteful number, since it uses less digits than its factorization.

2121242042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508765.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2121242042 is about 46056.9434721845. The cubic root of 2121242042 is about 1284.8824839668.

Adding to 2121242042 its reverse (2402421212), we get a palindrome (4523663254).

The spelling of 2121242042 in words is "two billion, one hundred twenty-one million, two hundred forty-two thousand, forty-two".