11121221102 has 4 divisors (see below), whose sum is σ = 16681831656. Its totient is φ = 5560610550.

The previous prime is 11121221101. The next prime is 11121221131. The reversal of 11121221102 is 20112212111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780305274 + ... + 2780305277.

It is an arithmetic number, because the mean of its divisors is an integer number (4170457914).

Almost surely, 2^11121221102 is an apocalyptic number.

11121221102 is a deficient number, since it is larger than the sum of its proper divisors (5560610554).

11121221102 is an equidigital number, since it uses as much as digits as its factorization.

11121221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560610553.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121221102 its reverse (20112212111), we get a palindrome (31233433213).

The spelling of 11121221102 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".