200011221020 has 96 divisors (see below), whose sum is σ = 459544155840. Its totient is φ = 72677468160.

The previous prime is 200011221013. The next prime is 200011221023. The reversal of 200011221020 is 20122110002.

It is a happy number.

It is a super-2 number, since 2×200011221020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200011220992 and 200011221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200011221023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8738351 + ... + 8761209.

It is an arithmetic number, because the mean of its divisors is an integer number (4786918290).

Almost surely, 2^200011221020 is an apocalyptic number.

200011221020 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 200011221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229772077920).

200011221020 is an abundant number, since it is smaller than the sum of its proper divisors (259532934820).

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

200011221020 is a wasteful number, since it uses less digits than its factorization.

200011221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23415 (or 23413 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200011221020 its reverse (20122110002), we get a palindrome (220133331022).

The spelling of 200011221020 in words is "two hundred billion, eleven million, two hundred twenty-one thousand, twenty".