21103212132133 has 4 divisors (see below), whose sum is σ = 21117558300928. Its totient is φ = 21088865963340.

The previous prime is 21103212132113. The next prime is 21103212132157. The reversal of 21103212132133 is 33123121230112.

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 21103212132133 - 2⁹ = 21103212131621 is a prime.

It is a super-2 number, since 2×21103212132133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103212132098 and 21103212132107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103212132113) 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, 7173082191 + ... + 7173085132.

It is an arithmetic number, because the mean of its divisors is an integer number (5279389575232).

Almost surely, 2^{21103212132133} is an apocalyptic number.

It is an amenable number.

21103212132133 is a deficient number, since it is larger than the sum of its proper divisors (14346168795).

21103212132133 is a wasteful number, since it uses less digits than its factorization.

21103212132133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14346168794.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21103212132133 its reverse (33123121230112), we get a palindrome (54226333362245).

The spelling of 21103212132133 in words is "twenty-one trillion, one hundred three billion, two hundred twelve million, one hundred thirty-two thousand, one hundred thirty-three".