42001020120424 has 8 divisors (see below), whose sum is σ = 78751912725810. Its totient is φ = 21000510060208.

The previous prime is 42001020120349. The next prime is 42001020120439. The reversal of 42001020120424 is 42402102010024.

It can be written as a sum of positive squares in only one way, i.e., 36088254022500 + 5912766097924 = 6007350^2 + 2431618^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 42001020120395 and 42001020120404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625063757519 + ... + 2625063757534.

Almost surely, 2^{42001020120424} is an apocalyptic number.

It is an amenable number.

42001020120424 is a deficient number, since it is larger than the sum of its proper divisors (36750892605386).

42001020120424 is a wasteful number, since it uses less digits than its factorization.

42001020120424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250127515059 (or 5250127515055 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 42001020120424 its reverse (42402102010024), we get a palindrome (84403122130448).

The spelling of 42001020120424 in words is "forty-two trillion, one billion, twenty million, one hundred twenty thousand, four hundred twenty-four".