11011011211220 has 12 divisors (see below), whose sum is σ = 23123123543604. Its totient is φ = 4404404484480.

The previous prime is 11011011211199. The next prime is 11011011211231. The reversal of 11011011211220 is 2211211011011.

It can be written as a sum of positive squares in 2 ways, for example, as 6491254266436 + 4519756944784 = 2547794^2 + 2125972^2 .

It is a super-4 number, since 4×11011011211220⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 11011011211195 and 11011011211204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275275280261 + ... + 275275280300.

It is an arithmetic number, because the mean of its divisors is an integer number (1926926961967).

Almost surely, 2^{11011011211220} is an apocalyptic number.

11011011211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011011211220 is an abundant number, since it is smaller than the sum of its proper divisors (12112112332384).

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

11011011211220 is a wasteful number, since it uses less digits than its factorization.

11011011211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550550560570 (or 550550560568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11011011211220 its reverse (2211211011011), we get a palindrome (13222222222231).

The spelling of 11011011211220 in words is "eleven trillion, eleven billion, eleven million, two hundred eleven thousand, two hundred twenty".