821364011 has 4 divisors (see below), whose sum is σ = 884545872. Its totient is φ = 758182152.

The previous prime is 821364007. The next prime is 821364031. The reversal of 821364011 is 110463128.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 821364011 - 2² = 821364007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821364031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31590911 + ... + 31590936.

It is an arithmetic number, because the mean of its divisors is an integer number (221136468).

Almost surely, 2^821364011 is an apocalyptic number.

821364011 is a deficient number, since it is larger than the sum of its proper divisors (63181861).

821364011 is a wasteful number, since it uses less digits than its factorization.

821364011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63181860.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 821364011 is about 28659.4488956086. The cubic root of 821364011 is about 936.5088589120.

The spelling of 821364011 in words is "eight hundred twenty-one million, three hundred sixty-four thousand, eleven".