210121200103 has 4 divisors (see below), whose sum is σ = 211335773688. Its totient is φ = 208906626520.

The previous prime is 210121200097. The next prime is 210121200109. The reversal of 210121200103 is 301002121012.

210121200103 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 an interprime number because it is at equal distance from previous prime (210121200097) and next prime (210121200109).

It is a cyclic number.

It is not a de Polignac number, because 210121200103 - 2⁹ = 210121199591 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 (210121200109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607286533 + ... + 607286878.

It is an arithmetic number, because the mean of its divisors is an integer number (52833943422).

Almost surely, 2^210121200103 is an apocalyptic number.

210121200103 is a deficient number, since it is larger than the sum of its proper divisors (1214573585).

210121200103 is a wasteful number, since it uses less digits than its factorization.

210121200103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214573584.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210121200103 its reverse (301002121012), we get a palindrome (511123321115).

The spelling of 210121200103 in words is "two hundred ten billion, one hundred twenty-one million, two hundred thousand, one hundred three".