42040003210321 has 4 divisors (see below), whose sum is σ = 44512944575652. Its totient is φ = 39567061844992.

The previous prime is 42040003210313. The next prime is 42040003210339. The reversal of 42040003210321 is 12301230004024.

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 38218607694400 + 3821395515921 = 6182120^2 + 1954839^2 .

It is not a de Polignac number, because 42040003210321 - 2³ = 42040003210313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42040003210292 and 42040003210301.

It is not an unprimeable number, because it can be changed into a prime (42040003210301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236470682640 + ... + 1236470682673.

It is an arithmetic number, because the mean of its divisors is an integer number (11128236143913).

Almost surely, 2^{42040003210321} is an apocalyptic number.

It is an amenable number.

42040003210321 is a deficient number, since it is larger than the sum of its proper divisors (2472941365331).

42040003210321 is a wasteful number, since it uses less digits than its factorization.

42040003210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472941365330.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 42040003210321 its reverse (12301230004024), we get a palindrome (54341233214345).

The spelling of 42040003210321 in words is "forty-two trillion, forty billion, three million, two hundred ten thousand, three hundred twenty-one".