1000221220323 has 48 divisors (see below), whose sum is σ = 1568641445280. Its totient is φ = 610497119232.

The previous prime is 1000221220177. The next prime is 1000221220343. The reversal of 1000221220323 is 3230221220001.

1000221220323 is a `hidden beast` number, since 100 + 0 + 2 + 21 + 220 + 323 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1000221220323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000221220296 and 1000221220305.

It is not an unprimeable number, because it can be changed into a prime (1000221220343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8422011 + ... + 8539947.

It is an arithmetic number, because the mean of its divisors is an integer number (32680030110).

Almost surely, 2^{1000221220323} is an apocalyptic number.

1000221220323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1000221220323 is a deficient number, since it is larger than the sum of its proper divisors (568420224957).

1000221220323 is a wasteful number, since it uses less digits than its factorization.

1000221220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118548 (or 118545 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1000221220323 its reverse (3230221220001), we get a palindrome (4230442440324).

The spelling of 1000221220323 in words is "one trillion, two hundred twenty-one million, two hundred twenty thousand, three hundred twenty-three".