21210130023 has 8 divisors (see below), whose sum is σ = 28385305200. Its totient is φ = 14087520768.

The previous prime is 21210130021. The next prime is 21210130031. The reversal of 21210130023 is 32003101212.

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

It is not a de Polignac number, because 21210130023 - 2¹ = 21210130021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210129984 and 21210130011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210130021) 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, 13140538 + ... + 13142151.

It is an arithmetic number, because the mean of its divisors is an integer number (3548163150).

Almost surely, 2^21210130023 is an apocalyptic number.

21210130023 is a deficient number, since it is larger than the sum of its proper divisors (7175175177).

21210130023 is a wasteful number, since it uses less digits than its factorization.

21210130023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282961.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21210130023 its reverse (32003101212), we get a palindrome (53213231235).

The spelling of 21210130023 in words is "twenty-one billion, two hundred ten million, one hundred thirty thousand, twenty-three".