2140020321 has 4 divisors (see below), whose sum is σ = 2853360432. Its totient is φ = 1426680212.

The previous prime is 2140020313. The next prime is 2140020341. The reversal of 2140020321 is 1230200412.

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 a cyclic number.

It is not a de Polignac number, because 2140020321 - 2³ = 2140020313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2140020321.

It is not an unprimeable number, because it can be changed into a prime (2140020341) 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, 356670051 + ... + 356670056.

It is an arithmetic number, because the mean of its divisors is an integer number (713340108).

Almost surely, 2^2140020321 is an apocalyptic number.

It is an amenable number.

2140020321 is a deficient number, since it is larger than the sum of its proper divisors (713340111).

2140020321 is an equidigital number, since it uses as much as digits as its factorization.

2140020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713340110.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2140020321 is about 46260.3536627207. The cubic root of 2140020321 is about 1288.6628214753.

Adding to 2140020321 its reverse (1230200412), we get a palindrome (3370220733).

The spelling of 2140020321 in words is "two billion, one hundred forty million, twenty thousand, three hundred twenty-one".