42121101241 has 2 divisors, whose sum is σ = 42121101242. Its totient is φ = 42121101240.

The previous prime is 42121101181. The next prime is 42121101299. The reversal of 42121101241 is 14210112124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29999972025 + 12121129216 = 173205^2 + 110096^2 .

It is a cyclic number.

It is not a de Polignac number, because 42121101241 - 2²⁷ = 41986883513 is a prime.

It is not a weakly prime, because it can be changed into another prime (42121101041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060550620 + 21060550621.

It is an arithmetic number, because the mean of its divisors is an integer number (21060550621).

Almost surely, 2^42121101241 is an apocalyptic number.

It is an amenable number.

42121101241 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121101241 is an equidigital number, since it uses as much as digits as its factorization.

42121101241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 42121101241 its reverse (14210112124), we get a palindrome (56331213365).

The spelling of 42121101241 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred forty-one".