21130133213 has 16 divisors (see below), whose sum is σ = 24335489664. Its totient is φ = 17971584000.

The previous prime is 21130133191. The next prime is 21130133243. The reversal of 21130133213 is 31233103112.

It is a cyclic number.

It is not a de Polignac number, because 21130133213 - 2⁸ = 21130132957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130133243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3834206 + ... + 3839712.

It is an arithmetic number, because the mean of its divisors is an integer number (1520968104).

Almost surely, 2^21130133213 is an apocalyptic number.

It is an amenable number.

21130133213 is a deficient number, since it is larger than the sum of its proper divisors (3205356451).

21130133213 is a wasteful number, since it uses less digits than its factorization.

21130133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21130133213 its reverse (31233103112), we get a palindrome (52363236325).

The spelling of 21130133213 in words is "twenty-one billion, one hundred thirty million, one hundred thirty-three thousand, two hundred thirteen".