2124065021 has 16 divisors (see below), whose sum is σ = 2351059200. Its totient is φ = 1906901568.

The previous prime is 2124064961. The next prime is 2124065057. The reversal of 2124065021 is 1205604212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2124065021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124062021) 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, 53375 + ... + 84243.

It is an arithmetic number, because the mean of its divisors is an integer number (146941200).

Almost surely, 2^2124065021 is an apocalyptic number.

It is an amenable number.

2124065021 is a deficient number, since it is larger than the sum of its proper divisors (226994179).

2124065021 is a wasteful number, since it uses less digits than its factorization.

2124065021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31028.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2124065021 is about 46087.5798995782. The cubic root of 2124065021 is about 1285.4522112531.

Adding to 2124065021 its reverse (1205604212), we get a palindrome (3329669233).

The spelling of 2124065021 in words is "two billion, one hundred twenty-four million, sixty-five thousand, twenty-one".