42102123131 has 16 divisors (see below), whose sum is σ = 42753484800. Its totient is φ = 41456176608.

The previous prime is 42102123067. The next prime is 42102123137. The reversal of 42102123131 is 13132120124.

It is a cyclic number.

It is not a de Polignac number, because 42102123131 - 2⁶ = 42102123067 is a prime.

It is a super-2 number, since 2×42102123131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42102123137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14382590 + ... + 14385516.

It is an arithmetic number, because the mean of its divisors is an integer number (2672092800).

Almost surely, 2^42102123131 is an apocalyptic number.

42102123131 is a deficient number, since it is larger than the sum of its proper divisors (651361669).

42102123131 is a wasteful number, since it uses less digits than its factorization.

42102123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 42102123131 its reverse (13132120124), we get a palindrome (55234243255).

The spelling of 42102123131 in words is "forty-two billion, one hundred two million, one hundred twenty-three thousand, one hundred thirty-one".