21030322102123 has 4 divisors (see below), whose sum is σ = 21030332181768. Its totient is φ = 21030312022480.

The previous prime is 21030322102081. The next prime is 21030322102129. The reversal of 21030322102123 is 32120122303012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030322102123 is a prime.

It is a super-2 number, since 2×21030322102123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21030322102094 and 21030322102103.

It is not an unprimeable number, because it can be changed into a prime (21030322102129) 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, 615586 + ... + 6514567.

It is an arithmetic number, because the mean of its divisors is an integer number (5257583045442).

Almost surely, 2^{21030322102123} is an apocalyptic number.

21030322102123 is a deficient number, since it is larger than the sum of its proper divisors (10079645).

21030322102123 is an equidigital number, since it uses as much as digits as its factorization.

21030322102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10079644.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21030322102123 its reverse (32120122303012), we get a palindrome (53150444405135).

The spelling of 21030322102123 in words is "twenty-one trillion, thirty billion, three hundred twenty-two million, one hundred two thousand, one hundred twenty-three".