805021321211 has 8 divisors (see below), whose sum is σ = 824702969664. Its totient is φ = 785341910080.

The previous prime is 805021321183. The next prime is 805021321213. The reversal of 805021321211 is 112123120508.

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

It is a cyclic number.

It is not a de Polignac number, because 805021321211 - 2⁶ = 805021321147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805021321213) 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, 180926 + ... + 1281708.

It is an arithmetic number, because the mean of its divisors is an integer number (103087871208).

Almost surely, 2^805021321211 is an apocalyptic number.

805021321211 is a deficient number, since it is larger than the sum of its proper divisors (19681648453).

805021321211 is a wasteful number, since it uses less digits than its factorization.

805021321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118661.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 805021321211 its reverse (112123120508), we get a palindrome (917144441719).

The spelling of 805021321211 in words is "eight hundred five billion, twenty-one million, three hundred twenty-one thousand, two hundred eleven".