200221020 has 36 divisors (see below), whose sum is σ = 607337640. Its totient is φ = 53392224.

The previous prime is 200221013. The next prime is 200221027. The reversal of 200221020 is 20122002.

It is an interprime number because it is at equal distance from previous prime (200221013) and next prime (200221027).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200220993 and 200221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200221027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555990 + ... + 556349.

It is an arithmetic number, because the mean of its divisors is an integer number (16870490).

Almost surely, 2^200221020 is an apocalyptic number.

200221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200221020 is an abundant number, since it is smaller than the sum of its proper divisors (407116620).

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

200221020 is a wasteful number, since it uses less digits than its factorization.

200221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112354 (or 1112349 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 200221020 is about 14149.9477030836. The cubic root of 200221020 is about 585.0188904704.

Adding to 200221020 its reverse (20122002), we get a palindrome (220343022).

The spelling of 200221020 in words is "two hundred million, two hundred twenty-one thousand, twenty".