12121202211 has 4 divisors (see below), whose sum is σ = 16161602952. Its totient is φ = 8080801472.

The previous prime is 12121202201. The next prime is 12121202279. The reversal of 12121202211 is 11220212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11220212121 = 3 ⋅3740070707.

It is a cyclic number.

It is not a de Polignac number, because 12121202211 - 2⁵ = 12121202179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121202201) 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 3 ways as a sum of consecutive naturals, for example, 2020200366 + ... + 2020200371.

It is an arithmetic number, because the mean of its divisors is an integer number (4040400738).

Almost surely, 2^12121202211 is an apocalyptic number.

12121202211 is a deficient number, since it is larger than the sum of its proper divisors (4040400741).

12121202211 is an equidigital number, since it uses as much as digits as its factorization.

12121202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040400740.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121202211 its reverse (11220212121), we get a palindrome (23341414332).

The spelling of 12121202211 in words is "twelve billion, one hundred twenty-one million, two hundred two thousand, two hundred eleven".