2145314121 has 32 divisors (see below), whose sum is σ = 3101967360. Its totient is φ = 1314755904.

The previous prime is 2145314077. The next prime is 2145314123. The reversal of 2145314121 is 1214135412.

It is not a de Polignac number, because 2145314121 - 2⁹ = 2145313609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145314091 and 2145314100.

It is not an unprimeable number, because it can be changed into a prime (2145314123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451866 + ... + 456588.

It is an arithmetic number, because the mean of its divisors is an integer number (96936480).

Almost surely, 2^2145314121 is an apocalyptic number.

It is an amenable number.

2145314121 is a deficient number, since it is larger than the sum of its proper divisors (956653239).

2145314121 is a wasteful number, since it uses less digits than its factorization.

2145314121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005.

The product of its digits is 960, while the sum is 24.

The square root of 2145314121 is about 46317.5357828976. The cubic root of 2145314121 is about 1289.7245412685.

Adding to 2145314121 its reverse (1214135412), we get a palindrome (3359449533).

The spelling of 2145314121 in words is "two billion, one hundred forty-five million, three hundred fourteen thousand, one hundred twenty-one".