2143013021 has 16 divisors (see below), whose sum is σ = 2313215040. Its totient is φ = 1979147520.

The previous prime is 2143013011. The next prime is 2143013053. The reversal of 2143013021 is 1203103412.

It is a cyclic number.

It is not a de Polignac number, because 2143013021 - 2⁶ = 2143012957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143013011) 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, 122786 + ... + 139148.

It is an arithmetic number, because the mean of its divisors is an integer number (144575940).

Almost surely, 2^2143013021 is an apocalyptic number.

It is an amenable number.

2143013021 is a deficient number, since it is larger than the sum of its proper divisors (170202019).

2143013021 is a wasteful number, since it uses less digits than its factorization.

2143013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16556.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2143013021 is about 46292.6886343837. The cubic root of 2143013021 is about 1289.2632495562.

Adding to 2143013021 its reverse (1203103412), we get a palindrome (3346116433).

The spelling of 2143013021 in words is "two billion, one hundred forty-three million, thirteen thousand, twenty-one".