21130123012223 has 8 divisors (see below), whose sum is σ = 21163825959408. Its totient is φ = 21096427416064.

The previous prime is 21130123012171. The next prime is 21130123012231. The reversal of 21130123012223 is 32221032103112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130123012223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130123012283) 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, 3930140 + ... + 7596462.

It is an arithmetic number, because the mean of its divisors is an integer number (2645478244926).

Almost surely, 2^{21130123012223} is an apocalyptic number.

21130123012223 is a deficient number, since it is larger than the sum of its proper divisors (33702947185).

21130123012223 is an equidigital number, since it uses as much as digits as its factorization.

21130123012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675513.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21130123012223 its reverse (32221032103112), we get a palindrome (53351155115335).

The spelling of 21130123012223 in words is "twenty-one trillion, one hundred thirty billion, one hundred twenty-three million, twelve thousand, two hundred twenty-three".