21165201066096 has 120 divisors (see below), whose sum is σ = 59309185781664. Its totient is φ = 7046015224320.

The previous prime is 21165201066071. The next prime is 21165201066151. The reversal of 21165201066096 is 69066010256112.

21165201066096 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 5 + 20 + 10 + 6 + 609 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1525193110 + ... + 1525206986.

Almost surely, 2^{21165201066096} is an apocalyptic number.

It is an amenable number.

21165201066096 is an abundant number, since it is smaller than the sum of its proper divisors (38143984715568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21165201066096 is a wasteful number, since it uses less digits than its factorization.

21165201066096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26719 (or 26710 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 21165201066096 in words is "twenty-one trillion, one hundred sixty-five billion, two hundred one million, sixty-six thousand, ninety-six".