123220333311 has 4 divisors (see below), whose sum is σ = 164293777752. Its totient is φ = 82146888872.

The previous prime is 123220333253. The next prime is 123220333337. The reversal of 123220333311 is 113333022321.

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

It is a cyclic number.

It is not a de Polignac number, because 123220333311 - 2¹⁸ = 123220071167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220333381) 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, 20536722216 + ... + 20536722221.

It is an arithmetic number, because the mean of its divisors is an integer number (41073444438).

Almost surely, 2^123220333311 is an apocalyptic number.

123220333311 is a deficient number, since it is larger than the sum of its proper divisors (41073444441).

123220333311 is an equidigital number, since it uses as much as digits as its factorization.

123220333311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41073444440.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 123220333311 its reverse (113333022321), we get a palindrome (236553355632).

The spelling of 123220333311 in words is "one hundred twenty-three billion, two hundred twenty million, three hundred thirty-three thousand, three hundred eleven".