343220121 has 12 divisors (see below), whose sum is σ = 496979860. Its totient is φ = 228251520.

The previous prime is 343220113. The next prime is 343220147. The reversal of 343220121 is 121022343.

It can be written as a sum of positive squares in 2 ways, for example, as 291897225 + 51322896 = 17085^2 + 7164^2 .

It is not a de Polignac number, because 343220121 - 2³ = 343220113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343220094 and 343220103.

It is not an unprimeable number, because it can be changed into a prime (343220821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42940 + ... + 50301.

Almost surely, 2^343220121 is an apocalyptic number.

It is an amenable number.

343220121 is a deficient number, since it is larger than the sum of its proper divisors (153759739).

343220121 is a wasteful number, since it uses less digits than its factorization.

343220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93656 (or 93653 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 343220121 is about 18526.2009327331. The cubic root of 343220121 is about 700.1497101558.

Adding to 343220121 its reverse (121022343), we get a palindrome (464242464).

The spelling of 343220121 in words is "three hundred forty-three million, two hundred twenty thousand, one hundred twenty-one".