42113042121 has 16 divisors (see below), whose sum is σ = 56642721408. Its totient is φ = 27830361600.

The previous prime is 42113042117. The next prime is 42113042137. The reversal of 42113042121 is 12124031124.

It is not a de Polignac number, because 42113042121 - 2² = 42113042117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42113040121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44185 + ... + 293561.

It is an arithmetic number, because the mean of its divisors is an integer number (3540170088).

Almost surely, 2^42113042121 is an apocalyptic number.

It is an amenable number.

42113042121 is a deficient number, since it is larger than the sum of its proper divisors (14529679287).

42113042121 is a wasteful number, since it uses less digits than its factorization.

42113042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249872.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 42113042121 its reverse (12124031124), we get a palindrome (54237073245).

The spelling of 42113042121 in words is "forty-two billion, one hundred thirteen million, forty-two thousand, one hundred twenty-one".