12222112001 has 4 divisors (see below), whose sum is σ = 13333213104. Its totient is φ = 11111010900.

The previous prime is 12222111977. The next prime is 12222112003. The reversal of 12222112001 is 10021122221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10021122221 = 11 ⋅911011111.

It is a de Polignac number, because none of the positive numbers 2^k-12222112001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222112003) 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, 555550535 + ... + 555550556.

It is an arithmetic number, because the mean of its divisors is an integer number (3333303276).

Almost surely, 2^12222112001 is an apocalyptic number.

12222112001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222112001 is a deficient number, since it is larger than the sum of its proper divisors (1111101103).

12222112001 is a wasteful number, since it uses less digits than its factorization.

12222112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111101102.

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

Adding to 12222112001 its reverse (10021122221), we get a palindrome (22243234222).

The spelling of 12222112001 in words is "twelve billion, two hundred twenty-two million, one hundred twelve thousand, one".