313212121211 has 16 divisors (see below), whose sum is σ = 345155970528. Its totient is φ = 281848032000.

The previous prime is 313212121181. The next prime is 313212121247. The reversal of 313212121211 is 112121212313.

It is a cyclic number.

It is not a de Polignac number, because 313212121211 - 2⁶ = 313212121147 is a prime.

It is a super-2 number, since 2×313212121211² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313212121811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4651661 + ... + 4718513.

It is an arithmetic number, because the mean of its divisors is an integer number (21572248158).

Almost surely, 2^313212121211 is an apocalyptic number.

313212121211 is a deficient number, since it is larger than the sum of its proper divisors (31943849317).

313212121211 is a wasteful number, since it uses less digits than its factorization.

313212121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71182.

The product of its digits is 144, while the sum is 20.

Adding to 313212121211 its reverse (112121212313), we get a palindrome (425333333524).

The spelling of 313212121211 in words is "three hundred thirteen billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".