12126022211 has 4 divisors (see below), whose sum is σ = 12653240592. Its totient is φ = 11598803832.

The previous prime is 12126022187. The next prime is 12126022241. The reversal of 12126022211 is 11222062121.

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 12126022211 - 2¹⁸ = 12125760067 is a prime.

It is a super-3 number, since 3×12126022211³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12126022241) 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, 263609156 + ... + 263609201.

It is an arithmetic number, because the mean of its divisors is an integer number (3163310148).

Almost surely, 2^12126022211 is an apocalyptic number.

12126022211 is a deficient number, since it is larger than the sum of its proper divisors (527218381).

12126022211 is an equidigital number, since it uses as much as digits as its factorization.

12126022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527218380.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12126022211 its reverse (11222062121), we get a palindrome (23348084332).

The spelling of 12126022211 in words is "twelve billion, one hundred twenty-six million, twenty-two thousand, two hundred eleven".