3421212121211 has 2 divisors, whose sum is σ = 3421212121212. Its totient is φ = 3421212121210.

The previous prime is 3421212121189. The next prime is 3421212121291. The reversal of 3421212121211 is 1121212121243.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3421212121211 - 2¹⁸ = 3421211859067 is a prime.

It is a super-2 number, since 2×3421212121211² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3421212121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710606060605 + 1710606060606.

It is an arithmetic number, because the mean of its divisors is an integer number (1710606060606).

Almost surely, 2^{3421212121211} is an apocalyptic number.

3421212121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421212121211 is an equidigital number, since it uses as much as digits as its factorization.

3421212121211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

Adding to 3421212121211 its reverse (1121212121243), we get a palindrome (4542424242454).

The spelling of 3421212121211 in words is "three trillion, four hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".