42035131635921 has 24 divisors (see below), whose sum is σ = 67672657746720. Its totient is φ = 24986827472256.

The previous prime is 42035131635907. The next prime is 42035131635923. The reversal of 42035131635921 is 12953613153024.

42035131635921 is a `hidden beast` number, since 4 + 2 + 0 + 3 + 5 + 1 + 3 + 1 + 635 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 42035131635921 - 2³¹ = 42032984152273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42035131635923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7229981895 + ... + 7229987708.

It is an arithmetic number, because the mean of its divisors is an integer number (2819694072780).

Almost surely, 2^{42035131635921} is an apocalyptic number.

It is an amenable number.

42035131635921 is a deficient number, since it is larger than the sum of its proper divisors (25637526110799).

42035131635921 is a wasteful number, since it uses less digits than its factorization.

42035131635921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14459969645 (or 14459969642 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

Adding to 42035131635921 its reverse (12953613153024), we get a palindrome (54988744788945).

The spelling of 42035131635921 in words is "forty-two trillion, thirty-five billion, one hundred thirty-one million, six hundred thirty-five thousand, nine hundred twenty-one".