12011023213 has 16 divisors (see below), whose sum is σ = 14256311040. Its totient is φ = 9904346496.

The previous prime is 12011023169. The next prime is 12011023237. The reversal of 12011023213 is 31232011021.

It is a cyclic number.

It is not a de Polignac number, because 12011023213 - 2⁹ = 12011022701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011023273) 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, 237481 + ... + 283582.

It is an arithmetic number, because the mean of its divisors is an integer number (891019440).

Almost surely, 2^12011023213 is an apocalyptic number.

It is an amenable number.

12011023213 is a deficient number, since it is larger than the sum of its proper divisors (2245287827).

12011023213 is an equidigital number, since it uses as much as digits as its factorization.

12011023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521196.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12011023213 its reverse (31232011021), we get a palindrome (43243034234).

The spelling of 12011023213 in words is "twelve billion, eleven million, twenty-three thousand, two hundred thirteen".