345120121 has 8 divisors (see below), whose sum is σ = 348199488. Its totient is φ = 342054000.

The previous prime is 345120109. The next prime is 345120187. The reversal of 345120121 is 121021543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345120121 - 2¹⁹ = 344595833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345121121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53226 + ... + 59356.

It is an arithmetic number, because the mean of its divisors is an integer number (43524936).

Almost surely, 2^345120121 is an apocalyptic number.

It is an amenable number.

345120121 is a deficient number, since it is larger than the sum of its proper divisors (3079367).

345120121 is a wasteful number, since it uses less digits than its factorization.

345120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6623.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 345120121 is about 18577.4088882169. The cubic root of 345120121 is about 701.4392977582.

Adding to 345120121 its reverse (121021543), we get a palindrome (466141664).

The spelling of 345120121 in words is "three hundred forty-five million, one hundred twenty thousand, one hundred twenty-one".