42332212121 has 4 divisors (see below), whose sum is σ = 42333205044. Its totient is φ = 42331219200.

The previous prime is 42332212081. The next prime is 42332212123. The reversal of 42332212121 is 12121223324.

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 21245977600 + 21086234521 = 145760^2 + 145211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42332212121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42332212123) 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, 429500 + ... + 518781.

It is an arithmetic number, because the mean of its divisors is an integer number (10583301261).

Almost surely, 2^42332212121 is an apocalyptic number.

It is an amenable number.

42332212121 is a deficient number, since it is larger than the sum of its proper divisors (992923).

42332212121 is an equidigital number, since it uses as much as digits as its factorization.

42332212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992922.

The product of its digits is 1152, while the sum is 23.

Adding to 42332212121 its reverse (12121223324), we get a palindrome (54453435445).

The spelling of 42332212121 in words is "forty-two billion, three hundred thirty-two million, two hundred twelve thousand, one hundred twenty-one".