11111122201220 has 48 divisors (see below), whose sum is σ = 23410462373760. Its totient is φ = 4429763437824.

The previous prime is 11111122201219. The next prime is 11111122201321. The reversal of 11111122201220 is 2210222111111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251822321 + ... + 251866439.

It is an arithmetic number, because the mean of its divisors is an integer number (487717966120).

Almost surely, 2^{11111122201220} is an apocalyptic number.

11111122201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111122201220 is an abundant number, since it is smaller than the sum of its proper divisors (12299340172540).

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

11111122201220 is a wasteful number, since it uses less digits than its factorization.

11111122201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85452 (or 85450 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11111122201220 its reverse (2210222111111), we get a palindrome (13321344312331).

The spelling of 11111122201220 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty".