10323100021 has 4 divisors (see below), whose sum is σ = 11117184652. Its totient is φ = 9529015392.

The previous prime is 10323100019. The next prime is 10323100027. The reversal of 10323100021 is 12000132301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12000132301 = 271 ⋅44280931.

It can be written as a sum of positive squares in 2 ways, for example, as 4557735121 + 5765364900 = 67511^2 + 75930^2 .

It is not a de Polignac number, because 10323100021 - 2¹ = 10323100019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 794084617 = 10323100021 / (1 + 0 + 3 + 2 + 3 + 1 + 0 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10323099974 and 10323100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10323100027) 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, 397042296 + ... + 397042321.

It is an arithmetic number, because the mean of its divisors is an integer number (2779296163).

Almost surely, 2^10323100021 is an apocalyptic number.

It is an amenable number.

10323100021 is a deficient number, since it is larger than the sum of its proper divisors (794084631).

10323100021 is an equidigital number, since it uses as much as digits as its factorization.

10323100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794084630.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 10323100021 its reverse (12000132301), we get a palindrome (22323232322).

The spelling of 10323100021 in words is "ten billion, three hundred twenty-three million, one hundred thousand, twenty-one".