10123133221 has 4 divisors (see below), whose sum is σ = 10563269472. Its totient is φ = 9682996972.

The previous prime is 10123133213. The next prime is 10123133239. The reversal of 10123133221 is 12233132101.

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.

It is a cyclic number.

It is not a de Polignac number, because 10123133221 - 2³ = 10123133213 is a prime.

It is a super-2 number, since 2×10123133221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123133201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220068091 + ... + 220068136.

It is an arithmetic number, because the mean of its divisors is an integer number (2640817368).

Almost surely, 2^10123133221 is an apocalyptic number.

It is an amenable number.

10123133221 is a deficient number, since it is larger than the sum of its proper divisors (440136251).

10123133221 is an equidigital number, since it uses as much as digits as its factorization.

10123133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440136250.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 10123133221 its reverse (12233132101), we get a palindrome (22356265322).

The spelling of 10123133221 in words is "ten billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-one".