202021321102 has 4 divisors (see below), whose sum is σ = 303031981656. Its totient is φ = 101010660550.

The previous prime is 202021321081. The next prime is 202021321111. The reversal of 202021321102 is 201123120202.

It is a happy number.

202021321102 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 a super-2 number, since 2×202021321102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50505330274 + ... + 50505330277.

It is an arithmetic number, because the mean of its divisors is an integer number (75757995414).

Almost surely, 2^202021321102 is an apocalyptic number.

202021321102 is a deficient number, since it is larger than the sum of its proper divisors (101010660554).

202021321102 is a wasteful number, since it uses less digits than its factorization.

202021321102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101010660553.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202021321102 its reverse (201123120202), we get a palindrome (403144441304).

Subtracting from 202021321102 its reverse (201123120202), we obtain a square (898200900 = 29970²).

The spelling of 202021321102 in words is "two hundred two billion, twenty-one million, three hundred twenty-one thousand, one hundred two".