11112212225 has 24 divisors (see below), whose sum is σ = 14679164640. Its totient is φ = 8320389120.

The previous prime is 11112212173. The next prime is 11112212269. The reversal of 11112212225 is 52221221111.

It is not a de Polignac number, because 11112212225 - 2²⁰ = 11111163649 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11112212197 and 11112212206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101504 + ... + 180353.

It is an arithmetic number, because the mean of its divisors is an integer number (611631860).

Almost surely, 2^11112212225 is an apocalyptic number.

It is an amenable number.

11112212225 is a deficient number, since it is larger than the sum of its proper divisors (3566952415).

11112212225 is a wasteful number, since it uses less digits than its factorization.

11112212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281969 (or 281964 counting only the distinct ones).

The product of its digits is 160, while the sum is 20.

Adding to 11112212225 its reverse (52221221111), we get a palindrome (63333433336).

The spelling of 11112212225 in words is "eleven billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-five".