12011221111213 has 4 divisors (see below), whose sum is σ = 12398679856768. Its totient is φ = 11623762365660.

The previous prime is 12011221111187. The next prime is 12011221111223. The reversal of 12011221111213 is 31211112211021.

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 12011221111213 - 2²⁹ = 12010684240301 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 (12011221111223) 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, 193729372731 + ... + 193729372792.

It is an arithmetic number, because the mean of its divisors is an integer number (3099669964192).

Almost surely, 2^{12011221111213} is an apocalyptic number.

It is an amenable number.

12011221111213 is a deficient number, since it is larger than the sum of its proper divisors (387458745555).

12011221111213 is an equidigital number, since it uses as much as digits as its factorization.

12011221111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387458745554.

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

Adding to 12011221111213 its reverse (31211112211021), we get a palindrome (43222333322234).

The spelling of 12011221111213 in words is "twelve trillion, eleven billion, two hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".