10123321021 has 8 divisors (see below), whose sum is σ = 11251993824. Its totient is φ = 9029376720.

The previous prime is 10123320989. The next prime is 10123321037. The reversal of 10123321021 is 12012332101.

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 10123321021 - 2⁵ = 10123320989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10123320986 and 10123321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123321121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8681511 + ... + 8682676.

It is an arithmetic number, because the mean of its divisors is an integer number (1406499228).

Almost surely, 2^10123321021 is an apocalyptic number.

10123321021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10123321021 is a deficient number, since it is larger than the sum of its proper divisors (1128672803).

10123321021 is a wasteful number, since it uses less digits than its factorization.

10123321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17364251.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10123321021 its reverse (12012332101), we get a palindrome (22135653122).

The spelling of 10123321021 in words is "ten billion, one hundred twenty-three million, three hundred twenty-one thousand, twenty-one".