21003112021133 has 4 divisors (see below), whose sum is σ = 22912485841248. Its totient is φ = 19093738201020.

The previous prime is 21003112021093. The next prime is 21003112021153. The reversal of 21003112021133 is 33112021130012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21003112021133 - 2¹⁸ = 21003111758989 is a prime.

It is a super-2 number, since 2×21003112021133² (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 (21003112021153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954686910041 + ... + 954686910062.

It is an arithmetic number, because the mean of its divisors is an integer number (5728121460312).

Almost surely, 2^{21003112021133} is an apocalyptic number.

It is an amenable number.

21003112021133 is a deficient number, since it is larger than the sum of its proper divisors (1909373820115).

21003112021133 is a wasteful number, since it uses less digits than its factorization.

21003112021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909373820114.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21003112021133 its reverse (33112021130012), we get a palindrome (54115133151145).

The spelling of 21003112021133 in words is "twenty-one trillion, three billion, one hundred twelve million, twenty-one thousand, one hundred thirty-three".