21201103133 has 4 divisors (see below), whose sum is σ = 24229832160. Its totient is φ = 18172374108.

The previous prime is 21201103103. The next prime is 21201103151. The reversal of 21201103133 is 33130110212.

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 not a de Polignac number, because 21201103133 - 2⁶ = 21201103069 is a prime.

It is a super-2 number, since 2×21201103133² (a number of 21 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 (21201103103) 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, 1514364503 + ... + 1514364516.

It is an arithmetic number, because the mean of its divisors is an integer number (6057458040).

Almost surely, 2^21201103133 is an apocalyptic number.

It is an amenable number.

21201103133 is a deficient number, since it is larger than the sum of its proper divisors (3028729027).

21201103133 is an equidigital number, since it uses as much as digits as its factorization.

21201103133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028729026.

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

Adding to 21201103133 its reverse (33130110212), we get a palindrome (54331213345).

The spelling of 21201103133 in words is "twenty-one billion, two hundred one million, one hundred three thousand, one hundred thirty-three".