202121220102 has 8 divisors (see below), whose sum is σ = 404242440216. Its totient is φ = 67373740032.

The previous prime is 202121220097. The next prime is 202121220121. The reversal of 202121220102 is 201022121202.

It is a sphenic number, since it is the product of 3 distinct primes.

202121220102 is an admirable number.

It is a super-2 number, since 2×202121220102² (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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16843435003 + ... + 16843435014.

It is an arithmetic number, because the mean of its divisors is an integer number (50530305027).

Almost surely, 2^202121220102 is an apocalyptic number.

202121220102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121220102 is a wasteful number, since it uses less digits than its factorization.

202121220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33686870022.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202121220102 its reverse (201022121202), we get a palindrome (403143341304).

The spelling of 202121220102 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred two".