21163573211 has 8 divisors (see below), whose sum is σ = 24091340544. Its totient is φ = 18403106920.

The previous prime is 21163573183. The next prime is 21163573213. The reversal of 21163573211 is 11237536112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21163573211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21163573213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41824991 + ... + 41825496.

It is an arithmetic number, because the mean of its divisors is an integer number (3011417568).

Almost surely, 2^21163573211 is an apocalyptic number.

21163573211 is a deficient number, since it is larger than the sum of its proper divisors (2927767333).

21163573211 is a wasteful number, since it uses less digits than its factorization.

21163573211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83650521.

The product of its digits is 7560, while the sum is 32.

The spelling of 21163573211 in words is "twenty-one billion, one hundred sixty-three million, five hundred seventy-three thousand, two hundred eleven".