12121010211 has 8 divisors (see below), whose sum is σ = 16365921280. Its totient is φ = 7978386312.

The previous prime is 12121010207. The next prime is 12121010221. The reversal of 12121010211 is 11201012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12121010211 - 2² = 12121010207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121010221) 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, 25571515 + ... + 25571988.

It is an arithmetic number, because the mean of its divisors is an integer number (2045740160).

Almost surely, 2^12121010211 is an apocalyptic number.

12121010211 is a deficient number, since it is larger than the sum of its proper divisors (4244911069).

12121010211 is an equidigital number, since it uses as much as digits as its factorization.

12121010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51143585.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121010211 its reverse (11201012121), we get a palindrome (23322022332).

The spelling of 12121010211 in words is "twelve billion, one hundred twenty-one million, ten thousand, two hundred eleven".