42031123139 has 2 divisors, whose sum is σ = 42031123140. Its totient is φ = 42031123138.

The previous prime is 42031123133. The next prime is 42031123157. The reversal of 42031123139 is 93132113024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42031123139 - 2¹² = 42031119043 is a prime.

It is a super-3 number, since 3×42031123139³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42031123133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21015561569 + 21015561570.

It is an arithmetic number, because the mean of its divisors is an integer number (21015561570).

Almost surely, 2^42031123139 is an apocalyptic number.

42031123139 is a deficient number, since it is larger than the sum of its proper divisors (1).

42031123139 is an equidigital number, since it uses as much as digits as its factorization.

42031123139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 42031123139 in words is "forty-two billion, thirty-one million, one hundred twenty-three thousand, one hundred thirty-nine".