313203111221 has 24 divisors (see below), whose sum is σ = 428033831904. Its totient is φ = 225280954080.

The previous prime is 313203111217. The next prime is 313203111253. The reversal of 313203111221 is 122111302313.

It is a happy number.

It is not a de Polignac number, because 313203111221 - 2² = 313203111217 is a prime.

It is a super-2 number, since 2×313203111221² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313203111193 and 313203111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313203111721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22342295 + ... + 22356308.

It is an arithmetic number, because the mean of its divisors is an integer number (17834742996).

Almost surely, 2^313203111221 is an apocalyptic number.

It is an amenable number.

313203111221 is a deficient number, since it is larger than the sum of its proper divisors (114830720683).

313203111221 is a wasteful number, since it uses less digits than its factorization.

313203111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44698641 (or 44698634 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 313203111221 its reverse (122111302313), we get a palindrome (435314413534).

It can be divided in two parts, 313203 and 111221, that added together give a palindrome (424424).

The spelling of 313203111221 in words is "three hundred thirteen billion, two hundred three million, one hundred eleven thousand, two hundred twenty-one".