21011132133 has 40 divisors (see below), whose sum is σ = 33329280600. Its totient is φ = 13145379840.

The previous prime is 21011132123. The next prime is 21011132137. The reversal of 21011132133 is 33123111012.

It can be written as a sum of positive squares in 4 ways, for example, as 9947668644 + 11063463489 = 99738^2 + 105183^2 .

It is not a de Polignac number, because 21011132133 - 2⁶ = 21011132069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011132137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 458713 + ... + 502433.

It is an arithmetic number, because the mean of its divisors is an integer number (833232015).

Almost surely, 2^21011132133 is an apocalyptic number.

It is an amenable number.

21011132133 is a deficient number, since it is larger than the sum of its proper divisors (12318148467).

21011132133 is a wasteful number, since it uses less digits than its factorization.

21011132133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44099 (or 44090 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21011132133 its reverse (33123111012), we get a palindrome (54134243145).

The spelling of 21011132133 in words is "twenty-one billion, eleven million, one hundred thirty-two thousand, one hundred thirty-three".