2164653411221 has 24 divisors (see below), whose sum is σ = 2523618284544. Its totient is φ = 1851327848160.

The previous prime is 2164653411211. The next prime is 2164653411227. The reversal of 2164653411221 is 1221143564612.

It is not a de Polignac number, because 2164653411221 - 2³⁰ = 2163579669397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164653411227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195519116 + ... + 195530186.

It is an arithmetic number, because the mean of its divisors is an integer number (105150761856).

Almost surely, 2^{2164653411221} is an apocalyptic number.

It is an amenable number.

2164653411221 is a deficient number, since it is larger than the sum of its proper divisors (358964873323).

2164653411221 is a wasteful number, since it uses less digits than its factorization.

2164653411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19521 (or 19514 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

Adding to 2164653411221 its reverse (1221143564612), we get a palindrome (3385796975833).

The spelling of 2164653411221 in words is "two trillion, one hundred sixty-four billion, six hundred fifty-three million, four hundred eleven thousand, two hundred twenty-one".