11111120211220 has 24 divisors (see below), whose sum is σ = 24086041233408. Its totient is φ = 4301078791200.

The previous prime is 11111120211211. The next prime is 11111120211239. The reversal of 11111120211220 is 2211202111111.

It is a junction number, because it is equal to n+sod(n) for n = 11111120211194 and 11111120211203.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8960580196 + ... + 8960581435.

It is an arithmetic number, because the mean of its divisors is an integer number (1003585051392).

Almost surely, 2^{11111120211220} is an apocalyptic number.

11111120211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111120211220 is an abundant number, since it is smaller than the sum of its proper divisors (12974921022188).

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

11111120211220 is a wasteful number, since it uses less digits than its factorization.

11111120211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17921161671 (or 17921161669 counting only the distinct ones).

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

Adding to 11111120211220 its reverse (2211202111111), we get a palindrome (13322322322331).

The spelling of 11111120211220 in words is "eleven trillion, one hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty".