1211021220323 has 2 divisors, whose sum is σ = 1211021220324. Its totient is φ = 1211021220322.

The previous prime is 1211021220319. The next prime is 1211021220377. The reversal of 1211021220323 is 3230221201121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3230221201121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211021220323 - 2² = 1211021220319 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211021220295 and 1211021220304.

It is not a weakly prime, because it can be changed into another prime (1211021220313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510610161 + 605510610162.

It is an arithmetic number, because the mean of its divisors is an integer number (605510610162).

Almost surely, 2^{1211021220323} is an apocalyptic number.

1211021220323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211021220323 is an equidigital number, since it uses as much as digits as its factorization.

1211021220323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1211021220323 its reverse (3230221201121), we get a palindrome (4441242421444).

The spelling of 1211021220323 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, three hundred twenty-three".