21133213113 has 8 divisors (see below), whose sum is σ = 28178510400. Its totient is φ = 14088362288.

The previous prime is 21133213099. The next prime is 21133213141. The reversal of 21133213113 is 31131233112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21133213113 - 2¹⁴ = 21133196729 is a prime.

It is a super-2 number, since 2×21133213113² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21133213113.

It is not an unprimeable number, because it can be changed into a prime (21133213313) 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, 21523 + ... + 206711.

It is an arithmetic number, because the mean of its divisors is an integer number (3522313800).

Almost surely, 2^21133213113 is an apocalyptic number.

It is an amenable number.

21133213113 is a deficient number, since it is larger than the sum of its proper divisors (7045297287).

21133213113 is a wasteful number, since it uses less digits than its factorization.

21133213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223231.

The product of its digits is 324, while the sum is 21.

Adding to 21133213113 its reverse (31131233112), we get a palindrome (52264446225).

The spelling of 21133213113 in words is "twenty-one billion, one hundred thirty-three million, two hundred thirteen thousand, one hundred thirteen".