11212121221102 has 4 divisors (see below), whose sum is σ = 16818181831656. Its totient is φ = 5606060610550.

The previous prime is 11212121221019. The next prime is 11212121221139. The reversal of 11212121221102 is 20112212121211.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11212121221102.

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, 2803030305274 + ... + 2803030305277.

It is an arithmetic number, because the mean of its divisors is an integer number (4204545457914).

Almost surely, 2^{11212121221102} is an apocalyptic number.

11212121221102 is a deficient number, since it is larger than the sum of its proper divisors (5606060610554).

11212121221102 is an equidigital number, since it uses as much as digits as its factorization.

11212121221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606060610553.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11212121221102 its reverse (20112212121211), we get a palindrome (31324333342313).

The spelling of 11212121221102 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".