42131221031023 has 4 divisors (see below), whose sum is σ = 42131320628040. Its totient is φ = 42131121434008.

The previous prime is 42131221030999. The next prime is 42131221031059. The reversal of 42131221031023 is 32013012213124.

42131221031023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42131221031023 - 2¹³ = 42131221022831 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 (42131221031423) 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, 49161265 + ... + 50010922.

It is an arithmetic number, because the mean of its divisors is an integer number (10532830157010).

Almost surely, 2^{42131221031023} is an apocalyptic number.

42131221031023 is a deficient number, since it is larger than the sum of its proper divisors (99597017).

42131221031023 is an equidigital number, since it uses as much as digits as its factorization.

42131221031023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99597016.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 42131221031023 its reverse (32013012213124), we get a palindrome (74144233244147).

The spelling of 42131221031023 in words is "forty-two trillion, one hundred thirty-one billion, two hundred twenty-one million, thirty-one thousand, twenty-three".