202011221220 has 48 divisors (see below), whose sum is σ = 585135956160. Its totient is φ = 52012084096.

The previous prime is 202011221213. The next prime is 202011221257. The reversal of 202011221220 is 22122110202.

202011221220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 202011221220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58047462 + ... + 58050941.

It is an arithmetic number, because the mean of its divisors is an integer number (12190332420).

Almost surely, 2^202011221220 is an apocalyptic number.

202011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202011221220 is an abundant number, since it is smaller than the sum of its proper divisors (383124734940).

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

202011221220 is a wasteful number, since it uses less digits than its factorization.

202011221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116098444 (or 116098442 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202011221220 its reverse (22122110202), we get a palindrome (224133331422).

It can be divided in two parts, 20201 and 1221220, that added together give a palindrome (1241421).

The spelling of 202011221220 in words is "two hundred two billion, eleven million, two hundred twenty-one thousand, two hundred twenty".