123221101311 has 32 divisors (see below), whose sum is σ = 227594534400. Its totient is φ = 64010960640.

The previous prime is 123221101307. The next prime is 123221101361. The reversal of 123221101311 is 113101122321.

123221101311 is a `hidden beast` number, since 1 + 232 + 21 + 101 + 311 = 666.

It is not a de Polignac number, because 123221101311 - 2² = 123221101307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221101361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29632626 + ... + 29636783.

It is an arithmetic number, because the mean of its divisors is an integer number (7112329200).

Almost surely, 2^123221101311 is an apocalyptic number.

123221101311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123221101311 is a deficient number, since it is larger than the sum of its proper divisors (104373433089).

123221101311 is a wasteful number, since it uses less digits than its factorization.

123221101311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59269436 (or 59269430 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 123221101311 its reverse (113101122321), we get a palindrome (236322223632).

The spelling of 123221101311 in words is "one hundred twenty-three billion, two hundred twenty-one million, one hundred one thousand, three hundred eleven".