12212312011 has 4 divisors (see below), whose sum is σ = 12224636224. Its totient is φ = 12199987800.

The previous prime is 12212311973. The next prime is 12212312017. The reversal of 12212312011 is 11021321221.

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 12212312011 - 2⁹ = 12212311499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212312017) 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, 6160620 + ... + 6162601.

It is an arithmetic number, because the mean of its divisors is an integer number (3056159056).

Almost surely, 2^12212312011 is an apocalyptic number.

12212312011 is a deficient number, since it is larger than the sum of its proper divisors (12324213).

12212312011 is an equidigital number, since it uses as much as digits as its factorization.

12212312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12324212.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12212312011 its reverse (11021321221), we get a palindrome (23233633232).

The spelling of 12212312011 in words is "twelve billion, two hundred twelve million, three hundred twelve thousand, eleven".