201021200 has 30 divisors (see below), whose sum is σ = 482954394. Its totient is φ = 80408320.

The previous prime is 201021199. The next prime is 201021211. The reversal of 201021200 is 2120102.

It can be written as a sum of positive squares in 3 ways, for example, as 58553104 + 142468096 = 7652^2 + 11936^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250877 + ... + 251676.

Almost surely, 2^201021200 is an apocalyptic number.

201021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021200 is an abundant number, since it is smaller than the sum of its proper divisors (281933194).

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

201021200 is a wasteful number, since it uses less digits than its factorization.

201021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502571 (or 502560 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 201021200 is about 14178.1945253971. The cubic root of 201021200 is about 585.7971940086.

Adding to 201021200 its reverse (2120102), we get a palindrome (203141302).

The spelling of 201021200 in words is "two hundred one million, twenty-one thousand, two hundred".