42121011 has 8 divisors (see below), whose sum is σ = 56197264. Its totient is φ = 28062720.

The previous prime is 42121007. The next prime is 42121067. The reversal of 42121011 is 11012124.

It is a happy number.

42121011 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 42121011 - 2² = 42121007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42171011) 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, 2571 + ... + 9531.

It is an arithmetic number, because the mean of its divisors is an integer number (7024658).

Almost surely, 2^42121011 is an apocalyptic number.

42121011 is a deficient number, since it is larger than the sum of its proper divisors (14076253).

42121011 is a wasteful number, since it uses less digits than its factorization.

42121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 42121011 is about 6490.0701845203. The cubic root of 42121011 is about 347.9361836343.

Adding to 42121011 its reverse (11012124), we get a palindrome (53133135).

The spelling of 42121011 in words is "forty-two million, one hundred twenty-one thousand, eleven".