42311224121 has 2 divisors, whose sum is σ = 42311224122. Its totient is φ = 42311224120.

The previous prime is 42311224079. The next prime is 42311224147. The reversal of 42311224121 is 12142211324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42158355625 + 152868496 = 205325^2 + 12364^2 .

It is a cyclic number.

It is not a de Polignac number, because 42311224121 - 2¹⁴ = 42311207737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42311224171) 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, 21155612060 + 21155612061.

It is an arithmetic number, because the mean of its divisors is an integer number (21155612061).

Almost surely, 2^42311224121 is an apocalyptic number.

It is an amenable number.

42311224121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42311224121 is an equidigital number, since it uses as much as digits as its factorization.

42311224121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

Adding to 42311224121 its reverse (12142211324), we get a palindrome (54453435445).

The spelling of 42311224121 in words is "forty-two billion, three hundred eleven million, two hundred twenty-four thousand, one hundred twenty-one".