11212321311 has 6 divisors (see below), whose sum is σ = 16195575240. Its totient is φ = 7474880868.

The previous prime is 11212321303. The next prime is 11212321319. The reversal of 11212321311 is 11312321211.

11212321311 is a `hidden beast` number, since 1 + 121 + 232 + 1 + 311 = 666.

It is an interprime number because it is at equal distance from previous prime (11212321303) and next prime (11212321319).

It is not a de Polignac number, because 11212321311 - 2³ = 11212321303 is a prime.

It is a super-2 number, since 2×11212321311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212321319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622906731 + ... + 622906748.

It is an arithmetic number, because the mean of its divisors is an integer number (2699262540).

Almost surely, 2^11212321311 is an apocalyptic number.

11212321311 is a deficient number, since it is larger than the sum of its proper divisors (4983253929).

11212321311 is a wasteful number, since it uses less digits than its factorization.

11212321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245813485 (or 1245813482 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11212321311 its reverse (11312321211), we get a palindrome (22524642522).

The spelling of 11212321311 in words is "eleven billion, two hundred twelve million, three hundred twenty-one thousand, three hundred eleven".