2142203221 has 2 divisors, whose sum is σ = 2142203222. Its totient is φ = 2142203220.

The previous prime is 2142203209. The next prime is 2142203243. The reversal of 2142203221 is 1223022412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1979360100 + 162843121 = 44490^2 + 12761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142203221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142203251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071101610 + 1071101611.

It is an arithmetic number, because the mean of its divisors is an integer number (1071101611).

Almost surely, 2^2142203221 is an apocalyptic number.

It is an amenable number.

2142203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142203221 is an equidigital number, since it uses as much as digits as its factorization.

2142203221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2142203221 is about 46283.9412863684. The cubic root of 2142203221 is about 1289.1008338507.

Adding to 2142203221 its reverse (1223022412), we get a palindrome (3365225633).

The spelling of 2142203221 in words is "two billion, one hundred forty-two million, two hundred three thousand, two hundred twenty-one".