12201212011 has 4 divisors (see below), whose sum is σ = 12202849152. Its totient is φ = 12199574872.

The previous prime is 12201212003. The next prime is 12201212039. The reversal of 12201212011 is 11021210221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021210221 = 7 ⋅1574458603.

It is a cyclic number.

It is not a de Polignac number, because 12201212011 - 2³ = 12201212003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201211982 and 12201212000.

It is not an unprimeable number, because it can be changed into a prime (12201212071) 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, 807340 + ... + 822313.

It is an arithmetic number, because the mean of its divisors is an integer number (3050712288).

Almost surely, 2^12201212011 is an apocalyptic number.

12201212011 is a deficient number, since it is larger than the sum of its proper divisors (1637141).

12201212011 is an equidigital number, since it uses as much as digits as its factorization.

12201212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637140.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12201212011 its reverse (11021210221), we get a palindrome (23222422232).

The spelling of 12201212011 in words is "twelve billion, two hundred one million, two hundred twelve thousand, eleven".