12211001001 has 12 divisors (see below), whose sum is σ = 18404987328. Its totient is φ = 7786725144.

The previous prime is 12211000999. The next prime is 12211001017. The reversal of 12211001001 is 10010011221.

It is a happy number.

It is not a de Polignac number, because 12211001001 - 2¹ = 12211000999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12211001081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29494965 + ... + 29495378.

It is an arithmetic number, because the mean of its divisors is an integer number (1533748944).

Almost surely, 2^12211001001 is an apocalyptic number.

It is an amenable number.

12211001001 is a deficient number, since it is larger than the sum of its proper divisors (6193986327).

12211001001 is a wasteful number, since it uses less digits than its factorization.

12211001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58990372 (or 58990369 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12211001001 its reverse (10010011221), we get a palindrome (22221012222).

It can be divided in two parts, 1221 and 1001001, that multiplied together give a palindrome (1222222221).

The spelling of 12211001001 in words is "twelve billion, two hundred eleven million, one thousand, one".