42121102 has 4 divisors (see below), whose sum is σ = 63181656. Its totient is φ = 21060550.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121102 is 20112124.

It is a happy number.

42121102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10530274 + ... + 10530277.

It is an arithmetic number, because the mean of its divisors is an integer number (15795414).

Almost surely, 2^42121102 is an apocalyptic number.

42121102 is a deficient number, since it is larger than the sum of its proper divisors (21060554).

42121102 is a wasteful number, since it uses less digits than its factorization.

42121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21060553.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 42121102 is about 6490.0771952266. The cubic root of 42121102 is about 347.9364341994.

Adding to 42121102 its reverse (20112124), we get a palindrome (62233226).

The spelling of 42121102 in words is "forty-two million, one hundred twenty-one thousand, one hundred two".