101221200220 has 48 divisors (see below), whose sum is σ = 247888670400. Its totient is φ = 34704409152.

The previous prime is 101221200163. The next prime is 101221200281. The reversal of 101221200220 is 22002122101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 101221200220.

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 15 ways as a sum of consecutive naturals, for example, 7370779 + ... + 7384498.

It is an arithmetic number, because the mean of its divisors is an integer number (5164347300).

Almost surely, 2^101221200220 is an apocalyptic number.

101221200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221200220 is an abundant number, since it is smaller than the sum of its proper divisors (146667470180).

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

101221200220 is a wasteful number, since it uses less digits than its factorization.

101221200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14755307 (or 14755291 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 101221200220 its reverse (22002122101), we get a palindrome (123223322321).

The spelling of 101221200220 in words is "one hundred one billion, two hundred twenty-one million, two hundred thousand, two hundred twenty".