11111223211020 has 36 divisors (see below), whose sum is σ = 33704043740640. Its totient is φ = 2962992856224.

The previous prime is 11111223211003. The next prime is 11111223211031. The reversal of 11111223211020 is 2011232211111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11111223210984 and 11111223211002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30864508740 + ... + 30864509099.

It is an arithmetic number, because the mean of its divisors is an integer number (936223437240).

Almost surely, 2^{11111223211020} is an apocalyptic number.

11111223211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111223211020 is an abundant number, since it is smaller than the sum of its proper divisors (22592820529620).

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

11111223211020 is a wasteful number, since it uses less digits than its factorization.

11111223211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61729017854 (or 61729017849 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11111223211020 its reverse (2011232211111), we get a palindrome (13122455422131).

Subtracting from 11111223211020 its reverse (2011232211111), we obtain a palindrome (9099990999909).

The spelling of 11111223211020 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-three million, two hundred eleven thousand, twenty".