42035021521020 has 144 divisors (see below), whose sum is σ = 139710474304128. Its totient is φ = 10145416913280.

The previous prime is 42035021520977. The next prime is 42035021521021. The reversal of 42035021521020 is 2012512053024.

42035021521020 is a `hidden beast` number, since 4 + 2 + 0 + 3 + 502 + 1 + 52 + 102 + 0 = 666.

It is a super-2 number, since 2×42035021521020² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42035021521021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46312234 + ... + 47211153.

It is an arithmetic number, because the mean of its divisors is an integer number (970211627112).

Almost surely, 2^{42035021521020} is an apocalyptic number.

It is an amenable number.

42035021521020 is an abundant number, since it is smaller than the sum of its proper divisors (97675452783108).

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

42035021521020 is a wasteful number, since it uses less digits than its factorization.

42035021521020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93523640 (or 93523635 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 42035021521020 its reverse (2012512053024), we get a palindrome (44047533574044).

The spelling of 42035021521020 in words is "forty-two trillion, thirty-five billion, twenty-one million, five hundred twenty-one thousand, twenty".