10123112221 has 4 divisors (see below), whose sum is σ = 10129813344. Its totient is φ = 10116411100.

The previous prime is 10123112171. The next prime is 10123112231. The reversal of 10123112221 is 12221132101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12221132101 = 19 ⋅643217479.

It is a cyclic number.

It is not a de Polignac number, because 10123112221 - 2¹³ = 10123104029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10123112195 and 10123112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123112231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348295 + ... + 3351316.

It is an arithmetic number, because the mean of its divisors is an integer number (2532453336).

Almost surely, 2^10123112221 is an apocalyptic number.

It is an amenable number.

10123112221 is a deficient number, since it is larger than the sum of its proper divisors (6701123).

10123112221 is an equidigital number, since it uses as much as digits as its factorization.

10123112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701122.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10123112221 its reverse (12221132101), we get a palindrome (22344244322).

The spelling of 10123112221 in words is "ten billion, one hundred twenty-three million, one hundred twelve thousand, two hundred twenty-one".