1223303311011 has 4 divisors (see below), whose sum is σ = 1631071081352. Its totient is φ = 815535540672.

The previous prime is 1223303311001. The next prime is 1223303311031. The reversal of 1223303311011 is 1101133033221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1223303311011 - 2²⁷ = 1223169093283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223303311001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203883885166 + ... + 203883885171.

It is an arithmetic number, because the mean of its divisors is an integer number (407767770338).

Almost surely, 2^{1223303311011} is an apocalyptic number.

1223303311011 is a deficient number, since it is larger than the sum of its proper divisors (407767770341).

1223303311011 is an equidigital number, since it uses as much as digits as its factorization.

1223303311011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407767770340.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1223303311011 its reverse (1101133033221), we get a palindrome (2324436344232).

The spelling of 1223303311011 in words is "one trillion, two hundred twenty-three billion, three hundred three million, three hundred eleven thousand, eleven".