42132021121 has 2 divisors, whose sum is σ = 42132021122. Its totient is φ = 42132021120.

The previous prime is 42132021103. The next prime is 42132021157. The reversal of 42132021121 is 12112023124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30446411121 + 11685610000 = 174489^2 + 108100^2 .

It is a cyclic number.

It is not a de Polignac number, because 42132021121 - 2⁷ = 42132020993 is a prime.

It is not a weakly prime, because it can be changed into another prime (42132028121) 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 as a sum of consecutive naturals, namely, 21066010560 + 21066010561.

It is an arithmetic number, because the mean of its divisors is an integer number (21066010561).

Almost surely, 2^42132021121 is an apocalyptic number.

It is an amenable number.

42132021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42132021121 is an equidigital number, since it uses as much as digits as its factorization.

42132021121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 42132021121 its reverse (12112023124), we get a palindrome (54244044245).

The spelling of 42132021121 in words is "forty-two billion, one hundred thirty-two million, twenty-one thousand, one hundred twenty-one".