11011121121211 has 8 divisors (see below), whose sum is σ = 11223059736240. Its totient is φ = 10799337380832.

The previous prime is 11011121121199. The next prime is 11011121121233. The reversal of 11011121121211 is 11212112111011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011121121211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11011121121281) 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, 38575096 + ... + 38859493.

It is an arithmetic number, because the mean of its divisors is an integer number (1402882467030).

Almost surely, 2^{11011121121211} is an apocalyptic number.

11011121121211 is a deficient number, since it is larger than the sum of its proper divisors (211938615029).

11011121121211 is an equidigital number, since it uses as much as digits as its factorization.

11011121121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77437325.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11011121121211 its reverse (11212112111011), we get a palindrome (22223233232222).

The spelling of 11011121121211 in words is "eleven trillion, eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".