123310100221 has 16 divisors (see below), whose sum is σ = 153766660608. Its totient is φ = 96067422000.

The previous prime is 123310100183. The next prime is 123310100227. The reversal of 123310100221 is 122001013321.

It is not a de Polignac number, because 123310100221 - 2¹⁹ = 123309575933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123310100195 and 123310100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123310100227) 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, 259446 + ... + 560296.

It is an arithmetic number, because the mean of its divisors is an integer number (9610416288).

Almost surely, 2^123310100221 is an apocalyptic number.

123310100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123310100221 is a deficient number, since it is larger than the sum of its proper divisors (30456560387).

123310100221 is a wasteful number, since it uses less digits than its factorization.

123310100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306192.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123310100221 its reverse (122001013321), we get a palindrome (245311113542).

The spelling of 123310100221 in words is "one hundred twenty-three billion, three hundred ten million, one hundred thousand, two hundred twenty-one".