21621350102003 has 8 divisors (see below), whose sum is σ = 21636961210368. Its totient is φ = 21605739582024.

The previous prime is 21621350101961. The next prime is 21621350102021. The reversal of 21621350102003 is 30020105312612.

It is a happy number.

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 21621350102003 - 2⁴⁴ = 4029164057587 is a prime.

It is a super-2 number, since 2×21621350102003² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21621350102063) 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, 95835950 + ... + 96061292.

It is an arithmetic number, because the mean of its divisors is an integer number (2704620151296).

Almost surely, 2^{21621350102003} is an apocalyptic number.

21621350102003 is a deficient number, since it is larger than the sum of its proper divisors (15611108365).

21621350102003 is a wasteful number, since it uses less digits than its factorization.

21621350102003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294193.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 21621350102003 its reverse (30020105312612), we get a palindrome (51641455414615).

The spelling of 21621350102003 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred fifty million, one hundred two thousand, three".