3121332211211 has 4 divisors (see below), whose sum is σ = 3121359276192. Its totient is φ = 3121305146232.

The previous prime is 3121332211199. The next prime is 3121332211247. The reversal of 3121332211211 is 1121122331213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121332211211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121332213211) 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, 13358756 + ... + 13590401.

It is an arithmetic number, because the mean of its divisors is an integer number (780339819048).

Almost surely, 2^{3121332211211} is an apocalyptic number.

3121332211211 is a deficient number, since it is larger than the sum of its proper divisors (27064981).

3121332211211 is a wasteful number, since it uses less digits than its factorization.

3121332211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27064980.

The product of its digits is 432, while the sum is 23.

Adding to 3121332211211 its reverse (1121122331213), we get a palindrome (4242454542424).

The spelling of 3121332211211 in words is "three trillion, one hundred twenty-one billion, three hundred thirty-two million, two hundred eleven thousand, two hundred eleven".