12031212211 has 4 divisors (see below), whose sum is σ = 12041926792. Its totient is φ = 12020497632.

The previous prime is 12031212197. The next prime is 12031212227. The reversal of 12031212211 is 11221213021.

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 12031212211 - 2¹³ = 12031204019 is a prime.

It is a super-2 number, since 2×12031212211² (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 (12031213211) 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, 5355606 + ... + 5357851.

It is an arithmetic number, because the mean of its divisors is an integer number (3010481698).

Almost surely, 2^12031212211 is an apocalyptic number.

12031212211 is a deficient number, since it is larger than the sum of its proper divisors (10714581).

12031212211 is a wasteful number, since it uses less digits than its factorization.

12031212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10714580.

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

Adding to 12031212211 its reverse (11221213021), we get a palindrome (23252425232).

The spelling of 12031212211 in words is "twelve billion, thirty-one million, two hundred twelve thousand, two hundred eleven".