42121319999 has 16 divisors (see below), whose sum is σ = 46532161536. Its totient is φ = 37810281600.

The previous prime is 42121319971. The next prime is 42121320041. The reversal of 42121319999 is 99991312124.

It is a cyclic number.

It is not a de Polignac number, because 42121319999 - 2¹⁶ = 42121254463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121319969) 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 in 15 ways as a sum of consecutive naturals, for example, 223319 + ... + 366215.

It is an arithmetic number, because the mean of its divisors is an integer number (2908260096).

Almost surely, 2^42121319999 is an apocalyptic number.

42121319999 is a deficient number, since it is larger than the sum of its proper divisors (4410841537).

42121319999 is a wasteful number, since it uses less digits than its factorization.

42121319999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143246.

The product of its digits is 314928, while the sum is 50.

The spelling of 42121319999 in words is "forty-two billion, one hundred twenty-one million, three hundred nineteen thousand, nine hundred ninety-nine".