42121035757 has 4 divisors (see below), whose sum is σ = 42373257696. Its totient is φ = 41868813820.

The previous prime is 42121035751. The next prime is 42121035769. The reversal of 42121035757 is 75753012124.

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 not a de Polignac number, because 42121035757 - 2⁷ = 42121035629 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 (42121035751) 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, 126110719 + ... + 126111052.

It is an arithmetic number, because the mean of its divisors is an integer number (10593314424).

Almost surely, 2^42121035757 is an apocalyptic number.

It is an amenable number.

42121035757 is a deficient number, since it is larger than the sum of its proper divisors (252221939).

42121035757 is a wasteful number, since it uses less digits than its factorization.

42121035757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252221938.

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 42121035757 in words is "forty-two billion, one hundred twenty-one million, thirty-five thousand, seven hundred fifty-seven".