343120121 has 4 divisors (see below), whose sum is σ = 354188544. Its totient is φ = 332051700.

The previous prime is 343120081. The next prime is 343120133. The reversal of 343120121 is 121021343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343120121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343120121.

It is not an unprimeable number, because it can be changed into a prime (343125121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534165 + ... + 5534226.

It is an arithmetic number, because the mean of its divisors is an integer number (88547136).

Almost surely, 2^343120121 is an apocalyptic number.

343120121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

343120121 is a deficient number, since it is larger than the sum of its proper divisors (11068423).

343120121 is a wasteful number, since it uses less digits than its factorization.

343120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068422.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 343120121 is about 18523.5018557507. The cubic root of 343120121 is about 700.0817054288.

Adding to 343120121 its reverse (121021343), we get a palindrome (464141464).

The spelling of 343120121 in words is "three hundred forty-three million, one hundred twenty thousand, one hundred twenty-one".