2130247121 has 4 divisors (see below), whose sum is σ = 2143815732. Its totient is φ = 2116678512.

The previous prime is 2130247117. The next prime is 2130247123. The reversal of 2130247121 is 1217420312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1416769600 + 713477521 = 37640^2 + 26711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130247121 - 2² = 2130247117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2130247123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6784070 + ... + 6784383.

It is an arithmetic number, because the mean of its divisors is an integer number (535953933).

Almost surely, 2^2130247121 is an apocalyptic number.

It is an amenable number.

2130247121 is a deficient number, since it is larger than the sum of its proper divisors (13568611).

2130247121 is a wasteful number, since it uses less digits than its factorization.

2130247121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13568610.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2130247121 is about 46154.6002149298. The cubic root of 2130247121 is about 1286.6981079579.

Adding to 2130247121 its reverse (1217420312), we get a palindrome (3347667433).

The spelling of 2130247121 in words is "two billion, one hundred thirty million, two hundred forty-seven thousand, one hundred twenty-one".