200221001020 has 12 divisors (see below), whose sum is σ = 420464102184. Its totient is φ = 80088400400.

The previous prime is 200221000979. The next prime is 200221001027. The reversal of 200221001020 is 20100122002.

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 = 200221000988 and 200221001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200221001027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005525006 + ... + 5005525045.

It is an arithmetic number, because the mean of its divisors is an integer number (35038675182).

Almost surely, 2^200221001020 is an apocalyptic number.

200221001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200221001020 is an abundant number, since it is smaller than the sum of its proper divisors (220243101164).

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

200221001020 is a wasteful number, since it uses less digits than its factorization.

200221001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011050060 (or 10011050058 counting only the distinct ones).

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

Adding to 200221001020 its reverse (20100122002), we get a palindrome (220321123022).

The spelling of 200221001020 in words is "two hundred billion, two hundred twenty-one million, one thousand, twenty".