21213003222133 has 8 divisors (see below), whose sum is σ = 23067876318552. Its totient is φ = 19425580056576.

The previous prime is 21213003222109. The next prime is 21213003222139. The reversal of 21213003222133 is 33122230031212.

It can be written as a sum of positive squares in 4 ways, for example, as 17347874746084 + 3865128476049 = 4165078^2 + 1965993^2 .

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 21213003222133 - 2⁹ = 21213003221621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21213003222098 and 21213003222107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213003222139) 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, 16862482060 + ... + 16862483317.

It is an arithmetic number, because the mean of its divisors is an integer number (2883484539819).

Almost surely, 2^{21213003222133} is an apocalyptic number.

It is an amenable number.

21213003222133 is a deficient number, since it is larger than the sum of its proper divisors (1854873096419).

21213003222133 is a wasteful number, since it uses less digits than its factorization.

21213003222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33724965431.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21213003222133 its reverse (33122230031212), we get a palindrome (54335233253345).

The spelling of 21213003222133 in words is "twenty-one trillion, two hundred thirteen billion, three million, two hundred twenty-two thousand, one hundred thirty-three".