121223313 has 6 divisors (see below), whose sum is σ = 175100354. Its totient is φ = 80815536.

The previous prime is 121223279. The next prime is 121223351. The reversal of 121223313 is 313322121.

It can be written as a sum of positive squares in only one way, i.e., 66048129 + 55175184 = 8127^2 + 7428^2 .

It is not a de Polignac number, because 121223313 - 2²⁰ = 120174737 is a prime.

It is a super-2 number, since 2×121223313² = 29390183229391938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121223213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6734620 + ... + 6734637.

Almost surely, 2^121223313 is an apocalyptic number.

It is an amenable number.

121223313 is a deficient number, since it is larger than the sum of its proper divisors (53877041).

121223313 is a wasteful number, since it uses less digits than its factorization.

121223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469263 (or 13469260 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 121223313 is about 11010.1459118397. The cubic root of 121223313 is about 494.9128343609.

Adding to 121223313 its reverse (313322121), we get a palindrome (434545434).

The spelling of 121223313 in words is "one hundred twenty-one million, two hundred twenty-three thousand, three hundred thirteen".