823421003011 has 4 divisors (see below), whose sum is σ = 845675624752. Its totient is φ = 801166381272.

The previous prime is 823421002973. The next prime is 823421003123. The reversal of 823421003011 is 110300124328.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 823421003011 - 2¹⁵ = 823420970243 is a prime.

It is a super-2 number, since 2×823421003011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823421003411) 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, 11127310815 + ... + 11127310888.

It is an arithmetic number, because the mean of its divisors is an integer number (211418906188).

Almost surely, 2^823421003011 is an apocalyptic number.

823421003011 is a deficient number, since it is larger than the sum of its proper divisors (22254621741).

823421003011 is a wasteful number, since it uses less digits than its factorization.

823421003011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22254621740.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 823421003011 its reverse (110300124328), we get a palindrome (933721127339).

The spelling of 823421003011 in words is "eight hundred twenty-three billion, four hundred twenty-one million, three thousand, eleven".