11112121102 has 4 divisors (see below), whose sum is σ = 16668181656. Its totient is φ = 5556060550.

The previous prime is 11112121079. The next prime is 11112121117. The reversal of 11112121102 is 20112121111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778030274 + ... + 2778030277.

It is an arithmetic number, because the mean of its divisors is an integer number (4167045414).

Almost surely, 2^11112121102 is an apocalyptic number.

11112121102 is a deficient number, since it is larger than the sum of its proper divisors (5556060554).

11112121102 is an equidigital number, since it uses as much as digits as its factorization.

11112121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556060553.

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

Adding to 11112121102 its reverse (20112121111), we get a palindrome (31224242213).

Subtracting 11112121102 from its reverse (20112121111), we obtain a palindrome (9000000009).

The spelling of 11112121102 in words is "eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred two".