123221231021 has 8 divisors (see below), whose sum is σ = 146947058304. Its totient is φ = 101026102320.

The previous prime is 123221230973. The next prime is 123221231123. The reversal of 123221231021 is 120132122321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123221231021 - 2²² = 123217036717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123221230984 and 123221231002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221231321) 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 7 ways as a sum of consecutive naturals, for example, 382674470 + ... + 382674791.

It is an arithmetic number, because the mean of its divisors is an integer number (18368382288).

Almost surely, 2^123221231021 is an apocalyptic number.

It is an amenable number.

123221231021 is a deficient number, since it is larger than the sum of its proper divisors (23725827283).

123221231021 is an equidigital number, since it uses as much as digits as its factorization.

123221231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765349291.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123221231021 its reverse (120132122321), we get a palindrome (243353353342).

The spelling of 123221231021 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, twenty-one".