202011220 has 24 divisors (see below), whose sum is σ = 427077000. Its totient is φ = 80260992.

The previous prime is 202011209. The next prime is 202011241. The reversal of 202011220 is 22110202.

It can be written as a sum of positive squares in 4 ways, for example, as 25280784 + 176730436 = 5028^2 + 13294^2 .

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 = 202011197 and 202011206.

It is a congruent number.

It is an unprimeable number.

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, 30915 + ... + 36874.

It is an arithmetic number, because the mean of its divisors is an integer number (17794875).

Almost surely, 2^202011220 is an apocalyptic number.

202011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202011220 is an abundant number, since it is smaller than the sum of its proper divisors (225065780).

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

202011220 is a wasteful number, since it uses less digits than its factorization.

202011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67947 (or 67945 counting only the distinct ones).

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

The square root of 202011220 is about 14213.0651162935. The cubic root of 202011220 is about 586.7572941662.

Adding to 202011220 its reverse (22110202), we get a palindrome (224121422).

The spelling of 202011220 in words is "two hundred two million, eleven thousand, two hundred twenty".