12001222211 has 8 divisors (see below), whose sum is σ = 13101029424. Its totient is φ = 10902879520.

The previous prime is 12001222193. The next prime is 12001222223. The reversal of 12001222211 is 11222210021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12001222211 - 2⁶ = 12001222147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001212211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348956 + ... + 381801.

It is an arithmetic number, because the mean of its divisors is an integer number (1637628678).

Almost surely, 2^12001222211 is an apocalyptic number.

12001222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001222211 is a deficient number, since it is larger than the sum of its proper divisors (1099807213).

12001222211 is a wasteful number, since it uses less digits than its factorization.

12001222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732261.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001222211 its reverse (11222210021), we get a palindrome (23223432232).

The spelling of 12001222211 in words is "twelve billion, one million, two hundred twenty-two thousand, two hundred eleven".