10123123221 has 12 divisors (see below), whose sum is σ = 15391883520. Its totient is φ = 6393551400.

The previous prime is 10123123207. The next prime is 10123123223. The reversal of 10123123221 is 12232132101.

It is not a de Polignac number, because 10123123221 - 2⁵ = 10123123189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10123123194 and 10123123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123123223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29599605 + ... + 29599946.

It is an arithmetic number, because the mean of its divisors is an integer number (1282656960).

Almost surely, 2^10123123221 is an apocalyptic number.

It is an amenable number.

10123123221 is a deficient number, since it is larger than the sum of its proper divisors (5268760299).

10123123221 is a wasteful number, since it uses less digits than its factorization.

10123123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59199576 (or 59199573 counting only the distinct ones).

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

Adding to 10123123221 its reverse (12232132101), we get a palindrome (22355255322).

The spelling of 10123123221 in words is "ten billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred twenty-one".