42131121140413 has 2 divisors, whose sum is σ = 42131121140414. Its totient is φ = 42131121140412.

The previous prime is 42131121140411. The next prime is 42131121140447. The reversal of 42131121140413 is 31404112113124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40296621553444 + 1834499586969 = 6347962^2 + 1354437^2 .

It is a cyclic number.

It is not a de Polignac number, because 42131121140413 - 2¹ = 42131121140411 is a prime.

Together with 42131121140411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42131121140411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065560570206 + 21065560570207.

It is an arithmetic number, because the mean of its divisors is an integer number (21065560570207).

Almost surely, 2^{42131121140413} is an apocalyptic number.

It is an amenable number.

42131121140413 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131121140413 is an equidigital number, since it uses as much as digits as its factorization.

42131121140413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 42131121140413 its reverse (31404112113124), we get a palindrome (73535233253537).

The spelling of 42131121140413 in words is "forty-two trillion, one hundred thirty-one billion, one hundred twenty-one million, one hundred forty thousand, four hundred thirteen".