123220321211 has 16 divisors (see below), whose sum is σ = 133995019200. Its totient is φ = 112634869248.

The previous prime is 123220321207. The next prime is 123220321229. The reversal of 123220321211 is 112123022321.

It is a cyclic number.

It is not a de Polignac number, because 123220321211 - 2² = 123220321207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220321241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643850 + ... + 813008.

It is an arithmetic number, because the mean of its divisors is an integer number (8374688700).

Almost surely, 2^123220321211 is an apocalyptic number.

123220321211 is a deficient number, since it is larger than the sum of its proper divisors (10774697989).

123220321211 is a wasteful number, since it uses less digits than its factorization.

123220321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169718.

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

Adding to 123220321211 its reverse (112123022321), we get a palindrome (235343343532).

The spelling of 123220321211 in words is "one hundred twenty-three billion, two hundred twenty million, three hundred twenty-one thousand, two hundred eleven".