11212012311 has 4 divisors (see below), whose sum is σ = 14949349752. Its totient is φ = 7474674872.

The previous prime is 11212012303. The next prime is 11212012373. The reversal of 11212012311 is 11321021211.

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

It is a cyclic number.

It is not a de Polignac number, because 11212012311 - 2³ = 11212012303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212019311) 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, 1868668716 + ... + 1868668721.

It is an arithmetic number, because the mean of its divisors is an integer number (3737337438).

Almost surely, 2^11212012311 is an apocalyptic number.

11212012311 is a deficient number, since it is larger than the sum of its proper divisors (3737337441).

11212012311 is an equidigital number, since it uses as much as digits as its factorization.

11212012311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737337440.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11212012311 its reverse (11321021211), we get a palindrome (22533033522).

The spelling of 11212012311 in words is "eleven billion, two hundred twelve million, twelve thousand, three hundred eleven".