12122211001 has 4 divisors (see below), whose sum is σ = 12380130432. Its totient is φ = 11864291572.

The previous prime is 12122210981. The next prime is 12122211037. The reversal of 12122211001 is 10011222121.

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: 10011222121 = 23 ⋅435270527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122211001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122211061) 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, 128959645 + ... + 128959738.

It is an arithmetic number, because the mean of its divisors is an integer number (3095032608).

Almost surely, 2^12122211001 is an apocalyptic number.

It is an amenable number.

12122211001 is a deficient number, since it is larger than the sum of its proper divisors (257919431).

12122211001 is an equidigital number, since it uses as much as digits as its factorization.

12122211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257919430.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12122211001 its reverse (10011222121), we get a palindrome (22133433122).

The spelling of 12122211001 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, one".