2122121242 has 16 divisors (see below), whose sum is σ = 3255368040. Its totient is φ = 1037256192.

The previous prime is 2122121227. The next prime is 2122121279. The reversal of 2122121242 is 2421212212.

It can be written as a sum of positive squares in 4 ways, for example, as 1506138481 + 615982761 = 38809^2 + 24819^2 .

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, 47817 + ... + 80812.

Almost surely, 2^2122121242 is an apocalyptic number.

2122121242 is a deficient number, since it is larger than the sum of its proper divisors (1133246798).

2122121242 is a wasteful number, since it uses less digits than its factorization.

2122121242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128817.

The product of its digits is 256, while the sum is 19.

The square root of 2122121242 is about 46066.4871897131. The cubic root of 2122121242 is about 1285.0599763070.

Adding to 2122121242 its reverse (2421212212), we get a palindrome (4543333454).

The spelling of 2122121242 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred forty-two".