11111012011221 has 8 divisors (see below), whose sum is σ = 14814950446560. Its totient is φ = 7407207458352.

The previous prime is 11111012011201. The next prime is 11111012011223. The reversal of 11111012011221 is 12211021011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111012011221 - 2²² = 11111007816917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111012011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111012011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33276811 + ... + 33609048.

It is an arithmetic number, because the mean of its divisors is an integer number (1851868805820).

Almost surely, 2^{11111012011221} is an apocalyptic number.

It is an amenable number.

11111012011221 is a deficient number, since it is larger than the sum of its proper divisors (3703938435339).

11111012011221 is an equidigital number, since it uses as much as digits as its factorization.

11111012011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66941235.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11111012011221 its reverse (12211021011111), we get a palindrome (23322033022332).

The spelling of 11111012011221 in words is "eleven trillion, one hundred eleven billion, twelve million, eleven thousand, two hundred twenty-one".