11220221220020 has 24 divisors (see below), whose sum is σ = 23562536493384. Its totient is φ = 4488074786816.

The previous prime is 11220221219981. The next prime is 11220221220059. The reversal of 11220221220020 is 2002212202211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11220221219981) and next prime (11220221220059).

It can be written as a sum of positive squares in 4 ways, for example, as 4284014085796 + 6936207134224 = 2069786^2 + 2633668^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8189444 + ... + 9460836.

It is an arithmetic number, because the mean of its divisors is an integer number (981772353891).

Almost surely, 2^{11220221220020} is an apocalyptic number.

11220221220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220221220020 is an abundant number, since it is smaller than the sum of its proper divisors (12342315273364).

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

11220221220020 is a wasteful number, since it uses less digits than its factorization.

11220221220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712659 (or 1712657 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11220221220020 its reverse (2002212202211), we get a palindrome (13222433422231).

The spelling of 11220221220020 in words is "eleven trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, twenty".