42031122113287 has 2 divisors, whose sum is σ = 42031122113288. Its totient is φ = 42031122113286.

The previous prime is 42031122113261. The next prime is 42031122113341. The reversal of 42031122113287 is 78231122113024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42031122113287 is a prime.

It is a super-2 number, since 2×42031122113287² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42031120113287) 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, 21015561056643 + 21015561056644.

It is an arithmetic number, because the mean of its divisors is an integer number (21015561056644).

Almost surely, 2^{42031122113287} is an apocalyptic number.

42031122113287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42031122113287 is an equidigital number, since it uses as much as digits as its factorization.

42031122113287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 42031122113287 in words is "forty-two trillion, thirty-one billion, one hundred twenty-two million, one hundred thirteen thousand, two hundred eighty-seven".