42133203121 has 4 divisors (see below), whose sum is σ = 44611626852. Its totient is φ = 39654779392.

The previous prime is 42133203083. The next prime is 42133203149. The reversal of 42133203121 is 12130233124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27111269025 + 15021934096 = 164655^2 + 122564^2 .

It is a cyclic number.

It is not a de Polignac number, because 42133203121 - 2⁹ = 42133202609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42133203092 and 42133203101.

It is not an unprimeable number, because it can be changed into a prime (42133203521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239211840 + ... + 1239211873.

It is an arithmetic number, because the mean of its divisors is an integer number (11152906713).

Almost surely, 2^42133203121 is an apocalyptic number.

It is an amenable number.

42133203121 is a deficient number, since it is larger than the sum of its proper divisors (2478423731).

42133203121 is a wasteful number, since it uses less digits than its factorization.

42133203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478423730.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 42133203121 its reverse (12130233124), we get a palindrome (54263436245).

The spelling of 42133203121 in words is "forty-two billion, one hundred thirty-three million, two hundred three thousand, one hundred twenty-one".