11212331311 has 4 divisors (see below), whose sum is σ = 11283747592. Its totient is φ = 11140915032.

The previous prime is 11212331309. The next prime is 11212331359. The reversal of 11212331311 is 11313321211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11313321211 = 17 ⋅665489483.

It is a cyclic number.

It is not a de Polignac number, because 11212331311 - 2¹ = 11212331309 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 (11212331411) 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, 35707905 + ... + 35708218.

It is an arithmetic number, because the mean of its divisors is an integer number (2820936898).

Almost surely, 2^11212331311 is an apocalyptic number.

11212331311 is a deficient number, since it is larger than the sum of its proper divisors (71416281).

11212331311 is an equidigital number, since it uses as much as digits as its factorization.

11212331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71416280.

The product of its digits is 108, while the sum is 19.

Adding to 11212331311 its reverse (11313321211), we get a palindrome (22525652522).

The spelling of 11212331311 in words is "eleven billion, two hundred twelve million, three hundred thirty-one thousand, three hundred eleven".