2121242010042 has 16 divisors (see below), whose sum is σ = 4465772652960. Its totient is φ = 669865897872.

The previous prime is 2121242010037. The next prime is 2121242010047. The reversal of 2121242010042 is 2400102421212.

It is an interprime number because it is at equal distance from previous prime (2121242010037) and next prime (2121242010047).

It is not an unprimeable number, because it can be changed into a prime (2121242010047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9303692913 + ... + 9303693140.

It is an arithmetic number, because the mean of its divisors is an integer number (279110790810).

Almost surely, 2^{2121242010042} is an apocalyptic number.

2121242010042 is an abundant number, since it is smaller than the sum of its proper divisors (2344530642918).

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

2121242010042 is a wasteful number, since it uses less digits than its factorization.

2121242010042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18607386077.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2121242010042 its reverse (2400102421212), we get a palindrome (4521344431254).

The spelling of 2121242010042 in words is "two trillion, one hundred twenty-one billion, two hundred forty-two million, ten thousand, forty-two".