21000002210023 has 8 divisors (see below), whose sum is σ = 21287796733568. Its totient is φ = 20712211017984.

The previous prime is 21000002210003. The next prime is 21000002210039. The reversal of 21000002210023 is 32001220000012.

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-21000002210023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000002209985 and 21000002210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000002210003) 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, 13550890 + ... + 15020872.

It is an arithmetic number, because the mean of its divisors is an integer number (2660974591696).

Almost surely, 2^{21000002210023} is an apocalyptic number.

21000002210023 is a deficient number, since it is larger than the sum of its proper divisors (287794523545).

21000002210023 is a wasteful number, since it uses less digits than its factorization.

21000002210023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665753.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21000002210023 its reverse (32001220000012), we get a palindrome (53001222210035).

The spelling of 21000002210023 in words is "twenty-one trillion, two million, two hundred ten thousand, twenty-three".