4042122010021 has 4 divisors (see below), whose sum is σ = 4042126070752. Its totient is φ = 4042117949292.

The previous prime is 4042122010013. The next prime is 4042122010027. The reversal of 4042122010021 is 1200102212404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4042122010021 - 2³ = 4042122010013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042122010027) 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 3 ways as a sum of consecutive naturals, for example, 590230 + ... + 2903896.

It is an arithmetic number, because the mean of its divisors is an integer number (1010531517688).

Almost surely, 2^{4042122010021} is an apocalyptic number.

It is an amenable number.

4042122010021 is a deficient number, since it is larger than the sum of its proper divisors (4060731).

4042122010021 is a wasteful number, since it uses less digits than its factorization.

4042122010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060730.

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

Adding to 4042122010021 its reverse (1200102212404), we get a palindrome (5242224222425).

The spelling of 4042122010021 in words is "four trillion, forty-two billion, one hundred twenty-two million, ten thousand, twenty-one".