2121040442 has 16 divisors (see below), whose sum is σ = 3237425280. Its totient is φ = 1041920352.

The previous prime is 2121040423. The next prime is 2121040451. The reversal of 2121040442 is 2440401212.

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, 239078 + ... + 247790.

It is an arithmetic number, because the mean of its divisors is an integer number (202339080).

Almost surely, 2^2121040442 is an apocalyptic number.

2121040442 is a deficient number, since it is larger than the sum of its proper divisors (1116384838).

2121040442 is a wasteful number, since it uses less digits than its factorization.

2121040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10837.

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

The square root of 2121040442 is about 46054.7548250992. The cubic root of 2121040442 is about 1284.8417781742.

Adding to 2121040442 its reverse (2440401212), we get a palindrome (4561441654).

The spelling of 2121040442 in words is "two billion, one hundred twenty-one million, forty thousand, four hundred forty-two".