200121102223220 has 48 divisors (see below), whose sum is σ = 421172280764928. Its totient is φ = 79873595448960.

The previous prime is 200121102223199. The next prime is 200121102223261. The reversal of 200121102223220 is 22322201121002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 200121102223192 and 200121102223201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851653787 + ... + 851888733.

It is an arithmetic number, because the mean of its divisors is an integer number (8774422515936).

Almost surely, 2^{200121102223220} is an apocalyptic number.

200121102223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121102223220 is an abundant number, since it is smaller than the sum of its proper divisors (221051178541708).

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

200121102223220 is a wasteful number, since it uses less digits than its factorization.

200121102223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327800 (or 327798 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 200121102223220 its reverse (22322201121002), we get a palindrome (222443303344222).

The spelling of 200121102223220 in words is "two hundred trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-three thousand, two hundred twenty".