12011211001 has 8 divisors (see below), whose sum is σ = 12264632424. Its totient is φ = 11760192000.

The previous prime is 12011210999. The next prime is 12011211011. The reversal of 12011211001 is 10011211021.

It can be written as a sum of positive squares in 4 ways, for example, as 146773225 + 11864437776 = 12115^2 + 108924^2 .

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 12011211001 - 2¹ = 12011210999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011211011) 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 7 ways as a sum of consecutive naturals, for example, 590500 + ... + 610501.

It is an arithmetic number, because the mean of its divisors is an integer number (1533079053).

Almost surely, 2^12011211001 is an apocalyptic number.

It is an amenable number.

12011211001 is a deficient number, since it is larger than the sum of its proper divisors (253421423).

12011211001 is a wasteful number, since it uses less digits than its factorization.

12011211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201211.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12011211001 its reverse (10011211021), we get a palindrome (22022422022).

The spelling of 12011211001 in words is "twelve billion, eleven million, two hundred eleven thousand, one".