121000200220 has 48 divisors (see below), whose sum is σ = 257268322080. Its totient is φ = 47799569664.

The previous prime is 121000200203. The next prime is 121000200221. The reversal of 121000200220 is 22002000121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121000200197 and 121000200206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000200221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578862 + ... + 759658.

It is an arithmetic number, because the mean of its divisors is an integer number (5359756710).

Almost surely, 2^121000200220 is an apocalyptic number.

121000200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000200220 is an abundant number, since it is smaller than the sum of its proper divisors (136268121860).

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

121000200220 is a wasteful number, since it uses less digits than its factorization.

121000200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181222 (or 181220 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 121000200220 its reverse (22002000121), we get a palindrome (143002200341).

The spelling of 121000200220 in words is "one hundred twenty-one billion, two hundred thousand, two hundred twenty".