11102121323221 has 4 divisors (see below), whose sum is σ = 11102139908992. Its totient is φ = 11102102737452.

The previous prime is 11102121323203. The next prime is 11102121323261. The reversal of 11102121323221 is 12232312120111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11102121323221 - 2¹³ = 11102121315029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102121323192 and 11102121323201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102121323201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8366055 + ... + 9601828.

It is an arithmetic number, because the mean of its divisors is an integer number (2775534977248).

Almost surely, 2^{11102121323221} is an apocalyptic number.

It is an amenable number.

11102121323221 is a deficient number, since it is larger than the sum of its proper divisors (18585771).

11102121323221 is an equidigital number, since it uses as much as digits as its factorization.

11102121323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18585770.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11102121323221 its reverse (12232312120111), we get a palindrome (23334433443332).

The spelling of 11102121323221 in words is "eleven trillion, one hundred two billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty-one".