12121333211 has 8 divisors (see below), whose sum is σ = 13069539504. Its totient is φ = 11175383520.

The previous prime is 12121333187. The next prime is 12121333243. The reversal of 12121333211 is 11233312121.

It is a happy number.

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 12121333211 - 2¹⁰ = 12121332187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121333291) 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, 552980 + ... + 574481.

It is an arithmetic number, because the mean of its divisors is an integer number (1633692438).

Almost surely, 2^12121333211 is an apocalyptic number.

12121333211 is a deficient number, since it is larger than the sum of its proper divisors (948206293).

12121333211 is a wasteful number, since it uses less digits than its factorization.

12121333211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128301.

The product of its digits is 216, while the sum is 20.

Adding to 12121333211 its reverse (11233312121), we get a palindrome (23354645332).

The spelling of 12121333211 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-three thousand, two hundred eleven".