2121662021722 has 16 divisors (see below), whose sum is σ = 3183464813760. Its totient is φ = 1060507147392.

The previous prime is 2121662021719. The next prime is 2121662021737. The reversal of 2121662021722 is 2271202661212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146122779 + ... + 146137297.

It is an arithmetic number, because the mean of its divisors is an integer number (198966550860).

Almost surely, 2^{2121662021722} is an apocalyptic number.

2121662021722 is a deficient number, since it is larger than the sum of its proper divisors (1061802792038).

2121662021722 is a wasteful number, since it uses less digits than its factorization.

2121662021722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31797.

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 2121662021722 its reverse (2271202661212), we get a palindrome (4392864682934).

The spelling of 2121662021722 in words is "two trillion, one hundred twenty-one billion, six hundred sixty-two million, twenty-one thousand, seven hundred twenty-two".