11130121211221 has 4 divisors (see below), whose sum is σ = 11130774903072. Its totient is φ = 11129467519372.

The previous prime is 11130121211197. The next prime is 11130121211239. The reversal of 11130121211221 is 12211212103111.

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 11130121211221 - 2¹⁹ = 11130120686933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11130121211821) 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, 326820385 + ... + 326854438.

It is an arithmetic number, because the mean of its divisors is an integer number (2782693725768).

Almost surely, 2^{11130121211221} is an apocalyptic number.

It is an amenable number.

11130121211221 is a deficient number, since it is larger than the sum of its proper divisors (653691851).

11130121211221 is an equidigital number, since it uses as much as digits as its factorization.

11130121211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653691850.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11130121211221 its reverse (12211212103111), we get a palindrome (23341333314332).

The spelling of 11130121211221 in words is "eleven trillion, one hundred thirty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".