42121384943 has 16 divisors (see below), whose sum is σ = 49929354240. Its totient is φ = 35106566400.

The previous prime is 42121384939. The next prime is 42121384951. The reversal of 42121384943 is 34948312124.

It is a cyclic number.

It is not a de Polignac number, because 42121384943 - 2² = 42121384939 is a prime.

It is a super-3 number, since 3×42121384943³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42121384943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121381943) 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, 3244130 + ... + 3257087.

It is an arithmetic number, because the mean of its divisors is an integer number (3120584640).

Almost surely, 2^42121384943 is an apocalyptic number.

42121384943 is a deficient number, since it is larger than the sum of its proper divisors (7807969297).

42121384943 is a wasteful number, since it uses less digits than its factorization.

42121384943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6501278.

The product of its digits is 165888, while the sum is 41.

The spelling of 42121384943 in words is "forty-two billion, one hundred twenty-one million, three hundred eighty-four thousand, nine hundred forty-three".