42121106 has 4 divisors (see below), whose sum is σ = 63181662. Its totient is φ = 21060552.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121106 is 60112124.

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

It can be written as a sum of positive squares in only one way, i.e., 31460881 + 10660225 = 5609^2 + 3265^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530275 + ... + 10530278.

Almost surely, 2^42121106 is an apocalyptic number.

42121106 is a deficient number, since it is larger than the sum of its proper divisors (21060556).

42121106 is a wasteful number, since it uses less digits than its factorization.

42121106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21060555.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 42121106 is about 6490.0775033893. The cubic root of 42121106 is about 347.9364452133.

The spelling of 42121106 in words is "forty-two million, one hundred twenty-one thousand, one hundred six".