351312121 has 2 divisors, whose sum is σ = 351312122. Its totient is φ = 351312120.

The previous prime is 351312113. The next prime is 351312161. The reversal of 351312121 is 121213153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343694521 + 7617600 = 18539^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 351312121 - 2³ = 351312113 is a prime.

It is not a weakly prime, because it can be changed into another prime (351312161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175656060 + 175656061.

It is an arithmetic number, because the mean of its divisors is an integer number (175656061).

Almost surely, 2^351312121 is an apocalyptic number.

It is an amenable number.

351312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

351312121 is an equidigital number, since it uses as much as digits as its factorization.

351312121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 351312121 is about 18743.3220374618. The cubic root of 351312121 is about 705.6094329558.

Adding to 351312121 its reverse (121213153), we get a palindrome (472525274).

The spelling of 351312121 in words is "three hundred fifty-one million, three hundred twelve thousand, one hundred twenty-one".