345012121 has 4 divisors (see below), whose sum is σ = 360012672. Its totient is φ = 330011572.

The previous prime is 345012119. The next prime is 345012133. The reversal of 345012121 is 121210543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121210543 = 3137 ⋅38639.

It is a cyclic number.

It is not a de Polignac number, because 345012121 - 2¹ = 345012119 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345012181) 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, 7500241 + ... + 7500286.

It is an arithmetic number, because the mean of its divisors is an integer number (90003168).

Almost surely, 2^345012121 is an apocalyptic number.

It is an amenable number.

345012121 is a deficient number, since it is larger than the sum of its proper divisors (15000551).

345012121 is a wasteful number, since it uses less digits than its factorization.

345012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000550.

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

The square root of 345012121 is about 18574.5019044926. The cubic root of 345012121 is about 701.3661219342.

Adding to 345012121 its reverse (121210543), we get a palindrome (466222664).

The spelling of 345012121 in words is "three hundred forty-five million, twelve thousand, one hundred twenty-one".