345121311 has 16 divisors (see below), whose sum is σ = 483595904. Its totient is φ = 218653344.

The previous prime is 345121261. The next prime is 345121321. The reversal of 345121311 is 113121543.

It is not a de Polignac number, because 345121311 - 2¹⁰ = 345120287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345121321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31381 + ... + 40926.

It is an arithmetic number, because the mean of its divisors is an integer number (30224744).

Almost surely, 2^345121311 is an apocalyptic number.

345121311 is a deficient number, since it is larger than the sum of its proper divisors (138474593).

345121311 is a wasteful number, since it uses less digits than its factorization.

345121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72390.

The product of its digits is 360, while the sum is 21.

The square root of 345121311 is about 18577.4409163372. The cubic root of 345121311 is about 701.4401039623.

Adding to 345121311 its reverse (113121543), we get a palindrome (458242854).

The spelling of 345121311 in words is "three hundred forty-five million, one hundred twenty-one thousand, three hundred eleven".