42121012433 has 4 divisors (see below), whose sum is σ = 42201859428. Its totient is φ = 42040165440.

The previous prime is 42121012411. The next prime is 42121012457. The reversal of 42121012433 is 33421012124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19663891984 + 22457120449 = 140228^2 + 149857^2 .

It is a cyclic number.

It is not a de Polignac number, because 42121012433 - 2⁸ = 42121012177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42121012399 and 42121012408.

It is not an unprimeable number, because it can be changed into a prime (42121012403) 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 3 ways as a sum of consecutive naturals, for example, 40422716 + ... + 40423757.

It is an arithmetic number, because the mean of its divisors is an integer number (10550464857).

Almost surely, 2^42121012433 is an apocalyptic number.

It is an amenable number.

42121012433 is a deficient number, since it is larger than the sum of its proper divisors (80846995).

42121012433 is an equidigital number, since it uses as much as digits as its factorization.

42121012433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80846994.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 42121012433 its reverse (33421012124), we get a palindrome (75542024557).

The spelling of 42121012433 in words is "forty-two billion, one hundred twenty-one million, twelve thousand, four hundred thirty-three".