3121221211211 has 2 divisors, whose sum is σ = 3121221211212. Its totient is φ = 3121221211210.

The previous prime is 3121221211201. The next prime is 3121221211307. The reversal of 3121221211211 is 1121121221213.

It is a m-pointer prime, because the next prime (3121221211307) can be obtained adding 3121221211211 to its product of digits (96).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121221211211 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121221211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560610605605 + 1560610605606.

It is an arithmetic number, because the mean of its divisors is an integer number (1560610605606).

Almost surely, 2^{3121221211211} is an apocalyptic number.

3121221211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121221211211 is an equidigital number, since it uses as much as digits as its factorization.

3121221211211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 20.

Adding to 3121221211211 its reverse (1121121221213), we get a palindrome (4242342432424).

The spelling of 3121221211211 in words is "three trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred eleven".