2121142242 has 48 divisors (see below), whose sum is σ = 4381188480. Its totient is φ = 684318816.

The previous prime is 2121142237. The next prime is 2121142249. The reversal of 2121142242 is 2422411212.

It is not an unprimeable number, because it can be changed into a prime (2121142249) 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 23 ways as a sum of consecutive naturals, for example, 2991384 + ... + 2992092.

It is an arithmetic number, because the mean of its divisors is an integer number (91274760).

Almost surely, 2^2121142242 is an apocalyptic number.

2121142242 is an abundant number, since it is smaller than the sum of its proper divisors (2260046238).

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

2121142242 is a wasteful number, since it uses less digits than its factorization.

2121142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 864 counting only the distinct ones).

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

The square root of 2121142242 is about 46055.8600180259. The cubic root of 2121142242 is about 1284.8623333065.

Adding to 2121142242 its reverse (2422411212), we get a palindrome (4543553454).

The spelling of 2121142242 in words is "two billion, one hundred twenty-one million, one hundred forty-two thousand, two hundred forty-two".