142121103 has 4 divisors (see below), whose sum is σ = 189494808. Its totient is φ = 94747400.

The previous prime is 142121099. The next prime is 142121113. The reversal of 142121103 is 301121241.

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 142121103 - 2² = 142121099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142121113) 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 3 ways as a sum of consecutive naturals, for example, 23686848 + ... + 23686853.

It is an arithmetic number, because the mean of its divisors is an integer number (47373702).

Almost surely, 2^142121103 is an apocalyptic number.

142121103 is a deficient number, since it is larger than the sum of its proper divisors (47373705).

142121103 is an equidigital number, since it uses as much as digits as its factorization.

142121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47373704.

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

The square root of 142121103 is about 11921.4555738802. The cubic root of 142121103 is about 521.8586139596.

Adding to 142121103 its reverse (301121241), we get a palindrome (443242344).

The spelling of 142121103 in words is "one hundred forty-two million, one hundred twenty-one thousand, one hundred three".