202123210103 has 4 divisors (see below), whose sum is σ = 202650947328. Its totient is φ = 201595472880.

The previous prime is 202123210099. The next prime is 202123210109. The reversal of 202123210103 is 301012321202.

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 202123210103 - 2² = 202123210099 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 (202123210109) 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, 263868038 + ... + 263868803.

It is an arithmetic number, because the mean of its divisors is an integer number (50662736832).

Almost surely, 2^202123210103 is an apocalyptic number.

202123210103 is a deficient number, since it is larger than the sum of its proper divisors (527737225).

202123210103 is an equidigital number, since it uses as much as digits as its factorization.

202123210103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527737224.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 202123210103 its reverse (301012321202), we get a palindrome (503135531305).

The spelling of 202123210103 in words is "two hundred two billion, one hundred twenty-three million, two hundred ten thousand, one hundred three".