2042443451421 has 24 divisors (see below), whose sum is σ = 3105535989920. Its totient is φ = 1289936697696.

The previous prime is 2042443451401. The next prime is 2042443451423. The reversal of 2042443451421 is 1241543442402.

2042443451421 is a `hidden beast` number, since 204 + 2 + 4 + 434 + 5 + 14 + 2 + 1 = 666.

It is not a de Polignac number, because 2042443451421 - 2¹⁸ = 2042443189277 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 (2042443451423) 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 23 ways as a sum of consecutive naturals, for example, 10441311 + ... + 10635123.

Almost surely, 2^{2042443451421} is an apocalyptic number.

It is an amenable number.

2042443451421 is a deficient number, since it is larger than the sum of its proper divisors (1063092538499).

2042443451421 is a wasteful number, since it uses less digits than its factorization.

2042443451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255465 (or 255462 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 2042443451421 its reverse (1241543442402), we get a palindrome (3283986893823).

The spelling of 2042443451421 in words is "two trillion, forty-two billion, four hundred forty-three million, four hundred fifty-one thousand, four hundred twenty-one".