200221121020 has 96 divisors (see below), whose sum is σ = 434385616896. Its totient is φ = 77474880000.

The previous prime is 200221121011. The next prime is 200221121131. The reversal of 200221121020 is 20121122002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82023000 + ... + 82025440.

It is an arithmetic number, because the mean of its divisors is an integer number (4524850176).

Almost surely, 2^200221121020 is an apocalyptic number.

200221121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200221121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217192808448).

200221121020 is an abundant number, since it is smaller than the sum of its proper divisors (234164495876).

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

200221121020 is a wasteful number, since it uses less digits than its factorization.

200221121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371 (or 3369 counting only the distinct ones).

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

Adding to 200221121020 its reverse (20121122002), we get a palindrome (220342243022).

The spelling of 200221121020 in words is "two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty".