12021211001 has 16 divisors (see below), whose sum is σ = 12419205120. Its totient is φ = 11630292240.

The previous prime is 12021210983. The next prime is 12021211117. The reversal of 12021211001 is 10011212021.

It is a cyclic number.

It is not a de Polignac number, because 12021211001 - 2¹⁴ = 12021194617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12021511001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2691296 + ... + 2695758.

It is an arithmetic number, because the mean of its divisors is an integer number (776200320).

Almost surely, 2^12021211001 is an apocalyptic number.

It is an amenable number.

12021211001 is a deficient number, since it is larger than the sum of its proper divisors (397994119).

12021211001 is an equidigital number, since it uses as much as digits as its factorization.

12021211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12021211001 its reverse (10011212021), we get a palindrome (22032423022).

The spelling of 12021211001 in words is "twelve billion, twenty-one million, two hundred eleven thousand, one".