42121311 has 8 divisors (see below), whose sum is σ = 58098480. Its totient is φ = 27112512.

The previous prime is 42121301. The next prime is 42121327. The reversal of 42121311 is 11312124.

42121311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42121311 - 2⁵ = 42121279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241990 + ... + 242163.

It is an arithmetic number, because the mean of its divisors is an integer number (7262310).

Almost surely, 2^42121311 is an apocalyptic number.

42121311 is a deficient number, since it is larger than the sum of its proper divisors (15977169).

42121311 is a wasteful number, since it uses less digits than its factorization.

42121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484185.

The product of its digits is 48, while the sum is 15.

The square root of 42121311 is about 6490.0932967100. The cubic root of 42121311 is about 347.9370096718.

Adding to 42121311 its reverse (11312124), we get a palindrome (53433435).

The spelling of 42121311 in words is "forty-two million, one hundred twenty-one thousand, three hundred eleven".