1211220203323 has 8 divisors (see below), whose sum is σ = 1307888020208. Its totient is φ = 1115051962464.

The previous prime is 1211220203317. The next prime is 1211220203359. The reversal of 1211220203323 is 3233020221121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211220203323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211220203294 and 1211220203303.

It is not an unprimeable number, because it can be changed into a prime (1211220203393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124888965 + ... + 124898662.

It is an arithmetic number, because the mean of its divisors is an integer number (163486002526).

Almost surely, 2^{1211220203323} is an apocalyptic number.

1211220203323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1211220203323 is a deficient number, since it is larger than the sum of its proper divisors (96667816885).

1211220203323 is a wasteful number, since it uses less digits than its factorization.

1211220203323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249788013.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1211220203323 its reverse (3233020221121), we get a palindrome (4444240424444).

The spelling of 1211220203323 in words is "one trillion, two hundred eleven billion, two hundred twenty million, two hundred three thousand, three hundred twenty-three".