3145312121 has 16 divisors (see below), whose sum is σ = 3610414080. Its totient is φ = 2684184720.

The previous prime is 3145312081. The next prime is 3145312129. The reversal of 3145312121 is 1212135413.

It is not a de Polignac number, because 3145312121 - 2⁶ = 3145312057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3145312129) 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, 2016740 + ... + 2018298.

It is an arithmetic number, because the mean of its divisors is an integer number (225650880).

Almost surely, 2^3145312121 is an apocalyptic number.

It is an amenable number.

3145312121 is a deficient number, since it is larger than the sum of its proper divisors (465101959).

3145312121 is a wasteful number, since it uses less digits than its factorization.

3145312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644.

The product of its digits is 720, while the sum is 23.

The square root of 3145312121 is about 56083.0823065209. The cubic root of 3145312121 is about 1465.1696574980.

Adding to 3145312121 its reverse (1212135413), we get a palindrome (4357447534).

The spelling of 3145312121 in words is "three billion, one hundred forty-five million, three hundred twelve thousand, one hundred twenty-one".