12011011213 has 8 divisors (see below), whose sum is σ = 12308075640. Its totient is φ = 11714142720.

The previous prime is 12011011193. The next prime is 12011011223. The reversal of 12011011213 is 31211011021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1261883529 + 10749127684 = 35523^2 + 103678^2 .

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 12011011213 - 2³³ = 3421076621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011011193 and 12011011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79231 + ... + 174067.

It is an arithmetic number, because the mean of its divisors is an integer number (1538509455).

Almost surely, 2^12011011213 is an apocalyptic number.

It is an amenable number.

12011011213 is a deficient number, since it is larger than the sum of its proper divisors (297064427).

12011011213 is an equidigital number, since it uses as much as digits as its factorization.

12011011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97967.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12011011213 its reverse (31211011021), we get a palindrome (43222022234).

The spelling of 12011011213 in words is "twelve billion, eleven million, eleven thousand, two hundred thirteen".