12211013 has 4 divisors (see below), whose sum is σ = 12231360. Its totient is φ = 12190668.

The previous prime is 12211009. The next prime is 12211021. The reversal of 12211013 is 31011221.

12211013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31011221 = 149 ⋅208129.

It is a cyclic number.

It is not a de Polignac number, because 12211013 - 2² = 12211009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210985 and 12211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9245 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (3057840).

Almost surely, 2^12211013 is an apocalyptic number.

It is an amenable number.

12211013 is a deficient number, since it is larger than the sum of its proper divisors (20347).

12211013 is an equidigital number, since it uses as much as digits as its factorization.

12211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20346.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12211013 is about 3494.4259900590. The cubic root of 12211013 is about 230.2770008532.

Adding to 12211013 its reverse (31011221), we get a palindrome (43222234).

The spelling of 12211013 in words is "twelve million, two hundred eleven thousand, thirteen".