11212312331 has 16 divisors (see below), whose sum is σ = 12303801600. Its totient is φ = 10132970400.

The previous prime is 11212312301. The next prime is 11212312367. The reversal of 11212312331 is 13321321211.

It is a happy number.

11212312331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11212312331 - 2¹⁰ = 11212311307 is a prime.

It is a super-2 number, since 2×11212312331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212312301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2478890 + ... + 2483408.

It is an arithmetic number, because the mean of its divisors is an integer number (768987600).

Almost surely, 2^11212312331 is an apocalyptic number.

11212312331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11212312331 is a deficient number, since it is larger than the sum of its proper divisors (1091489269).

11212312331 is a wasteful number, since it uses less digits than its factorization.

11212312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810.

The product of its digits is 216, while the sum is 20.

Adding to 11212312331 its reverse (13321321211), we get a palindrome (24533633542).

The spelling of 11212312331 in words is "eleven billion, two hundred twelve million, three hundred twelve thousand, three hundred thirty-one".