202021220221100 has 72 divisors (see below), whose sum is σ = 501015019007328. Its totient is φ = 69264087552000.

The previous prime is 202021220221061. The next prime is 202021220221127. The reversal of 202021220221100 is 1122022120202.

It is a happy number.

202021220221100 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179670650 + ... + 180791550.

Almost surely, 2^{202021220221100} is an apocalyptic number.

202021220221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021220221100 is an abundant number, since it is smaller than the sum of its proper divisors (298993798786228).

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

202021220221100 is a wasteful number, since it uses less digits than its factorization.

202021220221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378395 (or 1378388 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202021220221100 its reverse (1122022120202), we get a palindrome (203143242341302).

The spelling of 202021220221100 in words is "two hundred two trillion, twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred".