21313130133 has 16 divisors (see below), whose sum is σ = 28552441536. Its totient is φ = 14141429760.

The previous prime is 21313130131. The next prime is 21313130147. The reversal of 21313130133 is 33103131312.

It is not a de Polignac number, because 21313130133 - 2¹ = 21313130131 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313130131) 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 15 ways as a sum of consecutive naturals, for example, 592110 + ... + 627072.

It is an arithmetic number, because the mean of its divisors is an integer number (1784527596).

Almost surely, 2^21313130133 is an apocalyptic number.

It is an amenable number.

21313130133 is a deficient number, since it is larger than the sum of its proper divisors (7239311403).

21313130133 is a wasteful number, since it uses less digits than its factorization.

21313130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35924.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21313130133 its reverse (33103131312), we get a palindrome (54416261445).

The spelling of 21313130133 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty thousand, one hundred thirty-three".