21161164322 has 16 divisors (see below), whose sum is σ = 31972923072. Its totient is φ = 10503671760.

The previous prime is 21161164247. The next prime is 21161164369. The reversal of 21161164322 is 22346116112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 252572 + ... + 325752.

It is an arithmetic number, because the mean of its divisors is an integer number (1998307692).

Almost surely, 2^21161164322 is an apocalyptic number.

21161164322 is a deficient number, since it is larger than the sum of its proper divisors (10811758750).

21161164322 is a wasteful number, since it uses less digits than its factorization.

21161164322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74233.

The product of its digits is 3456, while the sum is 29.

The spelling of 21161164322 in words is "twenty-one billion, one hundred sixty-one million, one hundred sixty-four thousand, three hundred twenty-two".