10123310123021 has 4 divisors (see below), whose sum is σ = 10123423698432. Its totient is φ = 10123196547612.

The previous prime is 10123310123011. The next prime is 10123310123051. The reversal of 10123310123021 is 12032101332101.

It is a happy number.

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 10123310123021 - 2⁶ = 10123310122957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10123310122984 and 10123310123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123310123011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56653901 + ... + 56832306.

It is an arithmetic number, because the mean of its divisors is an integer number (2530855924608).

Almost surely, 2^{10123310123021} is an apocalyptic number.

It is an amenable number.

10123310123021 is a deficient number, since it is larger than the sum of its proper divisors (113575411).

10123310123021 is an equidigital number, since it uses as much as digits as its factorization.

10123310123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113575410.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 10123310123021 its reverse (12032101332101), we get a palindrome (22155411455122).

The spelling of 10123310123021 in words is "ten trillion, one hundred twenty-three billion, three hundred ten million, one hundred twenty-three thousand, twenty-one".