121343313 has 64 divisors (see below), whose sum is σ = 210212352. Its totient is φ = 60549120.

The previous prime is 121343311. The next prime is 121343317. The reversal of 121343313 is 313343121.

It is not a de Polignac number, because 121343313 - 2¹ = 121343311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121343313.

It is not an unprimeable number, because it can be changed into a prime (121343311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 413995 + ... + 414287.

It is an arithmetic number, because the mean of its divisors is an integer number (3284568).

Almost surely, 2^121343313 is an apocalyptic number.

121343313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121343313 is a deficient number, since it is larger than the sum of its proper divisors (88869039).

121343313 is a wasteful number, since it uses less digits than its factorization.

121343313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its digits is 648, while the sum is 21.

The square root of 121343313 is about 11015.5940829353. The cubic root of 121343313 is about 495.0760866614.

Adding to 121343313 its reverse (313343121), we get a palindrome (434686434).

The spelling of 121343313 in words is "one hundred twenty-one million, three hundred forty-three thousand, three hundred thirteen".