21003300121303 has 4 divisors (see below), whose sum is σ = 21003903577840. Its totient is φ = 21002696664768.

The previous prime is 21003300121277. The next prime is 21003300121351. The reversal of 21003300121303 is 30312100330012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21003300121303 - 2¹³ = 21003300113111 is a prime.

It is a super-2 number, since 2×21003300121303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003300121373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301676058 + ... + 301745671.

It is an arithmetic number, because the mean of its divisors is an integer number (5250975894460).

Almost surely, 2^{21003300121303} is an apocalyptic number.

21003300121303 is a deficient number, since it is larger than the sum of its proper divisors (603456537).

21003300121303 is an equidigital number, since it uses as much as digits as its factorization.

21003300121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603456536.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21003300121303 its reverse (30312100330012), we get a palindrome (51315400451315).

The spelling of 21003300121303 in words is "twenty-one trillion, three billion, three hundred million, one hundred twenty-one thousand, three hundred three".