1211221000323 has 24 divisors (see below), whose sum is σ = 1845090811200. Its totient is φ = 793794544488.

The previous prime is 1211221000303. The next prime is 1211221000333. The reversal of 1211221000323 is 3230001221121.

1211221000323 is a `hidden beast` number, since 121 + 1 + 221 + 0 + 0 + 0 + 323 = 666.

It is not a de Polignac number, because 1211221000323 - 2⁹ = 1211220999811 is a prime.

It is a super-2 number, since 2×1211221000323² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211221000296 and 1211221000305.

It is not an unprimeable number, because it can be changed into a prime (1211221000303) 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, 42226753 + ... + 42255426.

It is an arithmetic number, because the mean of its divisors is an integer number (76878783800).

Almost surely, 2^{1211221000323} is an apocalyptic number.

1211221000323 is a deficient number, since it is larger than the sum of its proper divisors (633869810877).

1211221000323 is an frugal number, since it uses more digits than its factorization.

1211221000323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84482253 (or 84482241 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1211221000323 its reverse (3230001221121), we get a palindrome (4441222221444).

The spelling of 1211221000323 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, three hundred twenty-three", and thus it is an aban number.