202121102103 has 4 divisors (see below), whose sum is σ = 269494802808. Its totient is φ = 134747401400.

The previous prime is 202121102063. The next prime is 202121102111. The reversal of 202121102103 is 301201121202.

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 202121102103 - 2¹⁰ = 202121101079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121102173) 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, 33686850348 + ... + 33686850353.

It is an arithmetic number, because the mean of its divisors is an integer number (67373700702).

Almost surely, 2^202121102103 is an apocalyptic number.

202121102103 is a deficient number, since it is larger than the sum of its proper divisors (67373700705).

202121102103 is an equidigital number, since it uses as much as digits as its factorization.

202121102103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373700704.

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

Adding to 202121102103 its reverse (301201121202), we get a palindrome (503322223305).

The spelling of 202121102103 in words is "two hundred two billion, one hundred twenty-one million, one hundred two thousand, one hundred three".