21210123200003 has 8 divisors (see below), whose sum is σ = 21351519254016. Its totient is φ = 21068739405000.

The previous prime is 21210123199999. The next prime is 21210123200033. The reversal of 21210123200003 is 30000232101212.

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

It is a cyclic number.

It is not a de Polignac number, because 21210123200003 - 2² = 21210123199999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210123200033) 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, 420278 + ... + 6526628.

It is an arithmetic number, because the mean of its divisors is an integer number (2668939906752).

Almost surely, 2^{21210123200003} is an apocalyptic number.

21210123200003 is a deficient number, since it is larger than the sum of its proper divisors (141396054013).

21210123200003 is a wasteful number, since it uses less digits than its factorization.

21210123200003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129505.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210123200003 its reverse (30000232101212), we get a palindrome (51210355301215).

The spelling of 21210123200003 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-three million, two hundred thousand, three".