21003313321133 has 16 divisors (see below), whose sum is σ = 24680800830336. Its totient is φ = 17621172613440.

The previous prime is 21003313321093. The next prime is 21003313321171. The reversal of 21003313321133 is 33112331330012.

It is a de Polignac number, because none of the positive numbers 2^k-21003313321133 is a prime.

It is a super-2 number, since 2×21003313321133² (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 (21003313323133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15971210 + ... + 17236187.

It is an arithmetic number, because the mean of its divisors is an integer number (1542550051896).

Almost surely, 2^{21003313321133} is an apocalyptic number.

It is an amenable number.

21003313321133 is a deficient number, since it is larger than the sum of its proper divisors (3677487509203).

21003313321133 is a wasteful number, since it uses less digits than its factorization.

21003313321133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33211844.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21003313321133 its reverse (33112331330012), we get a palindrome (54115644651145).

The spelling of 21003313321133 in words is "twenty-one trillion, three billion, three hundred thirteen million, three hundred twenty-one thousand, one hundred thirty-three".