42121103 has 4 divisors (see below), whose sum is σ = 42835080. Its totient is φ = 41407128.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121103 is 30112124.

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

It is a cyclic number.

It is not a de Polignac number, because 42121103 - 2² = 42121099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356900 + ... + 357017.

It is an arithmetic number, because the mean of its divisors is an integer number (10708770).

Almost surely, 2^42121103 is an apocalyptic number.

42121103 is a deficient number, since it is larger than the sum of its proper divisors (713977).

42121103 is an equidigital number, since it uses as much as digits as its factorization.

42121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713976.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 42121103 is about 6490.0772722673. The cubic root of 42121103 is about 347.9364369529.

Adding to 42121103 its reverse (30112124), we get a palindrome (72233227).

It can be divided in two parts, 42121 and 103, that added together give a palindrome (42224).

The spelling of 42121103 in words is "forty-two million, one hundred twenty-one thousand, one hundred three".