821222376723 has 24 divisors (see below), whose sum is σ = 1355825289728. Its totient is φ = 469215720432.

The previous prime is 821222376713. The next prime is 821222376731. The reversal of 821222376723 is 327673222128.

821222376723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 821222376723 - 2⁵ = 821222376691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821222376713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200011 + ... + 1297092.

Almost surely, 2^821222376723 is an apocalyptic number.

821222376723 is a deficient number, since it is larger than the sum of its proper divisors (534602913005).

821222376723 is a wasteful number, since it uses less digits than its factorization.

821222376723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505823 (or 1505820 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The spelling of 821222376723 in words is "eight hundred twenty-one billion, two hundred twenty-two million, three hundred seventy-six thousand, seven hundred twenty-three".