42041131021 has 2 divisors, whose sum is σ = 42041131022. Its totient is φ = 42041131020.

The previous prime is 42041131001. The next prime is 42041131057. The reversal of 42041131021 is 12013114024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21091752900 + 20949378121 = 145230^2 + 144739^2 .

It is a cyclic number.

It is not a de Polignac number, because 42041131021 - 2⁷ = 42041130893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42041131021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42041131001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020565510 + 21020565511.

It is an arithmetic number, because the mean of its divisors is an integer number (21020565511).

Almost surely, 2^42041131021 is an apocalyptic number.

It is an amenable number.

42041131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42041131021 is an equidigital number, since it uses as much as digits as its factorization.

42041131021 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 42041131021 its reverse (12013114024), we get a palindrome (54054245045).

The spelling of 42041131021 in words is "forty-two billion, forty-one million, one hundred thirty-one thousand, twenty-one".