2130121245 has 32 divisors (see below), whose sum is σ = 3899547648. Its totient is φ = 972652608.

The previous prime is 2130121237. The next prime is 2130121247. The reversal of 2130121245 is 5421210312.

It is not a de Polignac number, because 2130121245 - 2³ = 2130121237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130121247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84052 + ... + 106418.

It is an arithmetic number, because the mean of its divisors is an integer number (121860864).

Almost surely, 2^2130121245 is an apocalyptic number.

It is an amenable number.

2130121245 is a deficient number, since it is larger than the sum of its proper divisors (1769426403).

2130121245 is a wasteful number, since it uses less digits than its factorization.

2130121245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23289.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2130121245 is about 46153.2365603974. The cubic root of 2130121245 is about 1286.6727638559.

Adding to 2130121245 its reverse (5421210312), we get a palindrome (7551331557).

The spelling of 2130121245 in words is "two billion, one hundred thirty million, one hundred twenty-one thousand, two hundred forty-five".