21000133012103 has 4 divisors (see below), whose sum is σ = 24000152013840. Its totient is φ = 18000114010368.

The previous prime is 21000133012091. The next prime is 21000133012139. The reversal of 21000133012103 is 30121033100012.

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

It is not a de Polignac number, because 21000133012103 - 2¹⁴ = 21000132995719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000133012303) 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, 1500009500858 + ... + 1500009500871.

It is an arithmetic number, because the mean of its divisors is an integer number (6000038003460).

Almost surely, 2^{21000133012103} is an apocalyptic number.

21000133012103 is a deficient number, since it is larger than the sum of its proper divisors (3000019001737).

21000133012103 is an equidigital number, since it uses as much as digits as its factorization.

21000133012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000019001736.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21000133012103 its reverse (30121033100012), we get a palindrome (51121166112115).

The spelling of 21000133012103 in words is "twenty-one trillion, one hundred thirty-three million, twelve thousand, one hundred three".