2162041464221 has 2 divisors, whose sum is σ = 2162041464222. Its totient is φ = 2162041464220.

The previous prime is 2162041464217. The next prime is 2162041464257. The reversal of 2162041464221 is 1224641402612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2161308679321 + 732784900 = 1470139^2 + 27070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162041464221 - 2² = 2162041464217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2162041464721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081020732110 + 1081020732111.

It is an arithmetic number, because the mean of its divisors is an integer number (1081020732111).

Almost surely, 2^{2162041464221} is an apocalyptic number.

It is an amenable number.

2162041464221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162041464221 is an equidigital number, since it uses as much as digits as its factorization.

2162041464221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

Adding to 2162041464221 its reverse (1224641402612), we get a palindrome (3386682866833).

It can be divided in two parts, 2162041 and 464221, that added together give a palindrome (2626262).

The spelling of 2162041464221 in words is "two trillion, one hundred sixty-two billion, forty-one million, four hundred sixty-four thousand, two hundred twenty-one".