42354244121 has 6 divisors (see below), whose sum is σ = 49269222810. Its totient is φ = 36303637776.

The previous prime is 42354244069. The next prime is 42354244181. The reversal of 42354244121 is 12144245324.

It can be written as a sum of positive squares in only one way, i.e., 26654154121 + 15700090000 = 163261^2 + 125300^2 .

It is not a de Polignac number, because 42354244121 - 2²⁶ = 42287135257 is a prime.

It is a super-2 number, since 2×42354244121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42354244181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432186116 + ... + 432186213.

It is an arithmetic number, because the mean of its divisors is an integer number (8211537135).

Almost surely, 2^42354244121 is an apocalyptic number.

It is an amenable number.

42354244121 is a deficient number, since it is larger than the sum of its proper divisors (6914978689).

42354244121 is an equidigital number, since it uses as much as digits as its factorization.

42354244121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864372343 (or 864372336 counting only the distinct ones).

The product of its digits is 30720, while the sum is 32.

Adding to 42354244121 its reverse (12144245324), we get a palindrome (54498489445).

The spelling of 42354244121 in words is "forty-two billion, three hundred fifty-four million, two hundred forty-four thousand, one hundred twenty-one".