2162943021 has 4 divisors (see below), whose sum is σ = 2883924032. Its totient is φ = 1441962012.

The previous prime is 2162942959. The next prime is 2162943037. The reversal of 2162943021 is 1203492612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2162943021 - 2²² = 2158748717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2162943021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162943121) 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, 360490501 + ... + 360490506.

It is an arithmetic number, because the mean of its divisors is an integer number (720981008).

Almost surely, 2^2162943021 is an apocalyptic number.

It is an amenable number.

2162943021 is a deficient number, since it is larger than the sum of its proper divisors (720981011).

2162943021 is an equidigital number, since it uses as much as digits as its factorization.

2162943021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720981010.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 2162943021 is about 46507.4512417096. The cubic root of 2162943021 is about 1293.2476352255.

The spelling of 2162943021 in words is "two billion, one hundred sixty-two million, nine hundred forty-three thousand, twenty-one".