200111221020 has 96 divisors (see below), whose sum is σ = 570345120576. Its totient is φ = 52410009600.

The previous prime is 200111220997. The next prime is 200111221027. The reversal of 200111221020 is 20122111002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 200111220987 and 200111221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111221027) 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, 2437440 + ... + 2518200.

It is an arithmetic number, because the mean of its divisors is an integer number (5941095006).

Almost surely, 2^200111221020 is an apocalyptic number.

200111221020 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 200111221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285172560288).

200111221020 is an abundant number, since it is smaller than the sum of its proper divisors (370233899556).

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

200111221020 is a wasteful number, since it uses less digits than its factorization.

200111221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81511 (or 81509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200111221020 its reverse (20122111002), we get a palindrome (220233332022).

The spelling of 200111221020 in words is "two hundred billion, one hundred eleven million, two hundred twenty-one thousand, twenty".