123100123221 has 16 divisors (see below), whose sum is σ = 182522449920. Its totient is φ = 81998395200.

The previous prime is 123100123219. The next prime is 123100123241. The reversal of 123100123221 is 122321001321.

123100123221 is a `hidden beast` number, since 12 + 310 + 0 + 123 + 221 = 666.

It is not a de Polignac number, because 123100123221 - 2¹ = 123100123219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123100123194 and 123100123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123100123241) 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, 1865685 + ... + 1930538.

It is an arithmetic number, because the mean of its divisors is an integer number (11407653120).

Almost surely, 2^123100123221 is an apocalyptic number.

It is an amenable number.

123100123221 is a deficient number, since it is larger than the sum of its proper divisors (59422326699).

123100123221 is a wasteful number, since it uses less digits than its factorization.

123100123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797433 (or 3797427 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123100123221 its reverse (122321001321), we get a palindrome (245421124542).

The spelling of 123100123221 in words is "one hundred twenty-three billion, one hundred million, one hundred twenty-three thousand, two hundred twenty-one".