202121021103 has 16 divisors (see below), whose sum is σ = 273206626560. Its totient is φ = 132891655104.

The previous prime is 202121021087. The next prime is 202121021117. The reversal of 202121021103 is 301120121202.

It is not a de Polignac number, because 202121021103 - 2⁴ = 202121021087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121021203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4035150 + ... + 4084932.

It is an arithmetic number, because the mean of its divisors is an integer number (17075414160).

Almost surely, 2^202121021103 is an apocalyptic number.

202121021103 is a deficient number, since it is larger than the sum of its proper divisors (71085605457).

202121021103 is a wasteful number, since it uses less digits than its factorization.

202121021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68398.

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

Adding to 202121021103 its reverse (301120121202), we get a palindrome (503241142305).

The spelling of 202121021103 in words is "two hundred two billion, one hundred twenty-one million, twenty-one thousand, one hundred three".