123220111011 has 8 divisors (see below), whose sum is σ = 168114260160. Its totient is φ = 80236351272.

The previous prime is 123220110997. The next prime is 123220111037. The reversal of 123220111011 is 110111022321.

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

It is a de Polignac number, because none of the positive numbers 2^k-123220111011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123220211011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477597201 + ... + 477597458.

It is an arithmetic number, because the mean of its divisors is an integer number (21014282520).

Almost surely, 2^123220111011 is an apocalyptic number.

123220111011 is a deficient number, since it is larger than the sum of its proper divisors (44894149149).

123220111011 is an equidigital number, since it uses as much as digits as its factorization.

123220111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955194705.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 123220111011 its reverse (110111022321), we get a palindrome (233331133332).

The spelling of 123220111011 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred eleven thousand, eleven".