42103320342221 has 4 divisors (see below), whose sum is σ = 42111305046972. Its totient is φ = 42095335637472.

The previous prime is 42103320342217. The next prime is 42103320342247. The reversal of 42103320342221 is 12224302330124.

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 7814741976196 + 34288578366025 = 2795486^2 + 5855645^2 .

It is a cyclic number.

It is not a de Polignac number, because 42103320342221 - 2² = 42103320342217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42103320342271) 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, 3992344466 + ... + 3992355011.

It is an arithmetic number, because the mean of its divisors is an integer number (10527826261743).

Almost surely, 2^{42103320342221} is an apocalyptic number.

It is an amenable number.

42103320342221 is a deficient number, since it is larger than the sum of its proper divisors (7984704751).

42103320342221 is an equidigital number, since it uses as much as digits as its factorization.

42103320342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7984704750.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 42103320342221 its reverse (12224302330124), we get a palindrome (54327622672345).

The spelling of 42103320342221 in words is "forty-two trillion, one hundred three billion, three hundred twenty million, three hundred forty-two thousand, two hundred twenty-one".