21230132031133 has 4 divisors (see below), whose sum is σ = 22478963327100. Its totient is φ = 19981300735168.

The previous prime is 21230132031109. The next prime is 21230132031149. The reversal of 21230132031133 is 33113023103212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11679695848249 + 9550436182884 = 3417557^2 + 3090378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230132031133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230132031098 and 21230132031107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230132031533) 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, 624415647958 + ... + 624415647991.

It is an arithmetic number, because the mean of its divisors is an integer number (5619740831775).

Almost surely, 2^{21230132031133} is an apocalyptic number.

It is an amenable number.

21230132031133 is a deficient number, since it is larger than the sum of its proper divisors (1248831295967).

21230132031133 is a wasteful number, since it uses less digits than its factorization.

21230132031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248831295966.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21230132031133 its reverse (33113023103212), we get a palindrome (54343155134345).

The spelling of 21230132031133 in words is "twenty-one trillion, two hundred thirty billion, one hundred thirty-two million, thirty-one thousand, one hundred thirty-three".