345211123 has 2 divisors, whose sum is σ = 345211124. Its totient is φ = 345211122.

The previous prime is 345211081. The next prime is 345211151. The reversal of 345211123 is 321112543.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345211123 - 2²¹ = 343113971 is a prime.

It is a super-2 number, since 2×345211123² = 238341438885842258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 345211094 and 345211103.

It is not a weakly prime, because it can be changed into another prime (345211423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172605561 + 172605562.

It is an arithmetic number, because the mean of its divisors is an integer number (172605562).

Almost surely, 2^345211123 is an apocalyptic number.

345211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

345211123 is an equidigital number, since it uses as much as digits as its factorization.

345211123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 345211123 is about 18579.8579919223. The cubic root of 345211123 is about 701.5009446703.

Adding to 345211123 its reverse (321112543), we get a palindrome (666323666).

The spelling of 345211123 in words is "three hundred forty-five million, two hundred eleven thousand, one hundred twenty-three".