11221020011220 has 96 divisors (see below), whose sum is σ = 33271132019328. Its totient is φ = 2815908237312.

The previous prime is 11221020011219. The next prime is 11221020011221. The reversal of 11221020011220 is 2211002012211.

It is an interprime number because it is at equal distance from previous prime (11221020011219) and next prime (11221020011221).

It is a super-2 number, since 2×11221020011220² (a number of 27 digits) contains 22 as substring.

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 11221020011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221020011221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7634784 + ... + 8985096.

It is an arithmetic number, because the mean of its divisors is an integer number (346574291868).

Almost surely, 2^{11221020011220} is an apocalyptic number.

11221020011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221020011220 is an abundant number, since it is smaller than the sum of its proper divisors (22050112008108).

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

11221020011220 is a wasteful number, since it uses less digits than its factorization.

11221020011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358489 (or 1358487 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221020011220 its reverse (2211002012211), we get a palindrome (13432022023431).

The spelling of 11221020011220 in words is "eleven trillion, two hundred twenty-one billion, twenty million, eleven thousand, two hundred twenty".