212131121311211 has 4 divisors (see below), whose sum is σ = 212134471677312. Its totient is φ = 212127770945112.

The previous prime is 212131121311069. The next prime is 212131121311223. The reversal of 212131121311211 is 112113121131212.

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

It is a cyclic number.

It is not a de Polignac number, because 212131121311211 - 2¹⁰ = 212131121310187 is a prime.

It is a super-2 number, since 2×212131121311211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212131121311411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675088075 + ... + 1675214708.

It is an arithmetic number, because the mean of its divisors is an integer number (53033617919328).

Almost surely, 2^{212131121311211} is an apocalyptic number.

212131121311211 is a deficient number, since it is larger than the sum of its proper divisors (3350366101).

212131121311211 is an equidigital number, since it uses as much as digits as its factorization.

212131121311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350366100.

The product of its digits is 144, while the sum is 23.

Adding to 212131121311211 its reverse (112113121131212), we get a palindrome (324244242442423).

The spelling of 212131121311211 in words is "two hundred twelve trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred eleven thousand, two hundred eleven".