11331311021211 has 4 divisors (see below), whose sum is σ = 15108414694952. Its totient is φ = 7554207347472.

The previous prime is 11331311021207. The next prime is 11331311021249. The reversal of 11331311021211 is 11212011313311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11331311021211 - 2² = 11331311021207 is a prime.

It is a super-4 number, since 4×11331311021211⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331311021111) 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, 1888551836866 + ... + 1888551836871.

It is an arithmetic number, because the mean of its divisors is an integer number (3777103673738).

Almost surely, 2^{11331311021211} is an apocalyptic number.

11331311021211 is a deficient number, since it is larger than the sum of its proper divisors (3777103673741).

11331311021211 is an equidigital number, since it uses as much as digits as its factorization.

11331311021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777103673740.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 11331311021211 its reverse (11212011313311), we get a palindrome (22543322334522).

The spelling of 11331311021211 in words is "eleven trillion, three hundred thirty-one billion, three hundred eleven million, twenty-one thousand, two hundred eleven".