21230133213 has 8 divisors (see below), whose sum is σ = 28317429088. Its totient is φ = 14148129744.

The previous prime is 21230133191. The next prime is 21230133229. The reversal of 21230133213 is 31233103212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21230133213 - 2⁹ = 21230132701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21230133213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230133263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313731 + ... + 1329792.

It is an arithmetic number, because the mean of its divisors is an integer number (3539678636).

Almost surely, 2^21230133213 is an apocalyptic number.

It is an amenable number.

21230133213 is a deficient number, since it is larger than the sum of its proper divisors (7087295875).

21230133213 is a wasteful number, since it uses less digits than its factorization.

21230133213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646203.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21230133213 its reverse (31233103212), we get a palindrome (52463236425).

The spelling of 21230133213 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, two hundred thirteen".