2121001242 has 16 divisors (see below), whose sum is σ = 4332258432. Its totient is φ = 691957760.

The previous prime is 2121001241. The next prime is 2121001261. The reversal of 2121001242 is 2421001212.

It is not an unprimeable number, because it can be changed into a prime (2121001241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3760359 + ... + 3760922.

It is an arithmetic number, because the mean of its divisors is an integer number (270766152).

Almost surely, 2^2121001242 is an apocalyptic number.

2121001242 is an abundant number, since it is smaller than the sum of its proper divisors (2211257190).

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

2121001242 is a wasteful number, since it uses less digits than its factorization.

2121001242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521333.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2121001242 is about 46054.3292427541. The cubic root of 2121001242 is about 1284.8338628595.

Adding to 2121001242 its reverse (2421001212), we get a palindrome (4542002454).

The spelling of 2121001242 in words is "two billion, one hundred twenty-one million, one thousand, two hundred forty-two".