11111220112 has 10 divisors (see below), whose sum is σ = 21527988998. Its totient is φ = 5555610048.

The previous prime is 11111220073. The next prime is 11111220161. The reversal of 11111220112 is 21102211111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9825567376 + 1285652736 = 99124^2 + 35856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11111220092 and 11111220101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347225613 + ... + 347225644.

Almost surely, 2^11111220112 is an apocalyptic number.

It is an amenable number.

11111220112 is a deficient number, since it is larger than the sum of its proper divisors (10416768886).

11111220112 is an equidigital number, since it uses as much as digits as its factorization.

11111220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694451265 (or 694451259 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111220112 its reverse (21102211111), we get a palindrome (32213431223).

Subtracting 11111220112 from its reverse (21102211111), we obtain a palindrome (9990990999).

The spelling of 11111220112 in words is "eleven billion, one hundred eleven million, two hundred twenty thousand, one hundred twelve".