42571941121 has 4 divisors (see below), whose sum is σ = 42573726000. Its totient is φ = 42570156244.

The previous prime is 42571941119. The next prime is 42571941173. The reversal of 42571941121 is 12114917524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42571941121 - 2¹ = 42571941119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42571941521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856171 + ... + 904528.

It is an arithmetic number, because the mean of its divisors is an integer number (10643431500).

Almost surely, 2^42571941121 is an apocalyptic number.

It is an amenable number.

42571941121 is a deficient number, since it is larger than the sum of its proper divisors (1784879).

42571941121 is a wasteful number, since it uses less digits than its factorization.

42571941121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784878.

The product of its digits is 20160, while the sum is 37.

It can be divided in two parts, 4257 and 1941121, that added together give a triangular number (1945378 = T₁₉₇₂).

The spelling of 42571941121 in words is "forty-two billion, five hundred seventy-one million, nine hundred forty-one thousand, one hundred twenty-one".