2140324221 has 16 divisors (see below), whose sum is σ = 3263625728. Its totient is φ = 1222225200.

The previous prime is 2140324213. The next prime is 2140324223. The reversal of 2140324221 is 1224230412.

It is not a de Polignac number, because 2140324221 - 2³ = 2140324213 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140324223) 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 15 ways as a sum of consecutive naturals, for example, 1135 + ... + 65436.

It is an arithmetic number, because the mean of its divisors is an integer number (203976608).

Almost surely, 2^2140324221 is an apocalyptic number.

2140324221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2140324221 is a deficient number, since it is larger than the sum of its proper divisors (1123301507).

2140324221 is a wasteful number, since it uses less digits than its factorization.

2140324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68112.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2140324221 is about 46263.6382162060. The cubic root of 2140324221 is about 1288.7238187302.

Adding to 2140324221 its reverse (1224230412), we get a palindrome (3364554633).

The spelling of 2140324221 in words is "two billion, one hundred forty million, three hundred twenty-four thousand, two hundred twenty-one".