202021220 has 24 divisors (see below), whose sum is σ = 424545408. Its totient is φ = 80751200.

The previous prime is 202021219. The next prime is 202021223. The reversal of 202021220 is 22120202.

It is not an unprimeable number, because it can be changed into a prime (202021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36005 + ... + 41235.

It is an arithmetic number, because the mean of its divisors is an integer number (17689392).

Almost surely, 2^202021220 is an apocalyptic number.

202021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021220 is an abundant number, since it is smaller than the sum of its proper divisors (222524188).

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

202021220 is a wasteful number, since it uses less digits than its factorization.

202021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171 (or 7169 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 202021220 is about 14213.4169009426. The cubic root of 202021220 is about 586.7669759322.

Adding to 202021220 its reverse (22120202), we get a palindrome (224141422).

The spelling of 202021220 in words is "two hundred two million, twenty-one thousand, two hundred twenty".