11202111220 has 12 divisors (see below), whose sum is σ = 23524433604. Its totient is φ = 4480844480.

The previous prime is 11202111197. The next prime is 11202111229. The reversal of 11202111220 is 2211120211.

It can be written as a sum of positive squares in 2 ways, for example, as 2591013604 + 8611097616 = 50902^2 + 92796^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11202111220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202111229) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 280052761 + ... + 280052800.

It is an arithmetic number, because the mean of its divisors is an integer number (1960369467).

Almost surely, 2^11202111220 is an apocalyptic number.

11202111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11202111220 is an abundant number, since it is smaller than the sum of its proper divisors (12322322384).

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

11202111220 is a wasteful number, since it uses less digits than its factorization.

11202111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560105570 (or 560105568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11202111220 its reverse (2211120211), we get a palindrome (13413231431).

The spelling of 11202111220 in words is "eleven billion, two hundred two million, one hundred eleven thousand, two hundred twenty".