42112821145 has 8 divisors (see below), whose sum is σ = 50707862856. Its totient is φ = 33575271936.

The previous prime is 42112821133. The next prime is 42112821151. The reversal of 42112821145 is 54112821124.

It can be written as a sum of positive squares in 4 ways, for example, as 18934585609 + 23178235536 = 137603^2 + 152244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42112821145 - 2⁷ = 42112821017 is a prime.

It is a super-2 number, since 2×42112821145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14371512 + ... + 14374441.

It is an arithmetic number, because the mean of its divisors is an integer number (6338482857).

Almost surely, 2^42112821145 is an apocalyptic number.

It is an amenable number.

42112821145 is a deficient number, since it is larger than the sum of its proper divisors (8595041711).

42112821145 is a wasteful number, since it uses less digits than its factorization.

42112821145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28746251.

The product of its digits is 5120, while the sum is 31.

The spelling of 42112821145 in words is "forty-two billion, one hundred twelve million, eight hundred twenty-one thousand, one hundred forty-five".