213233022221321 has 4 divisors (see below), whose sum is σ = 213245098640532. Its totient is φ = 213220945802112.

The previous prime is 213233022221309. The next prime is 213233022221327. The reversal of 213233022221321 is 123122220332312.

213233022221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76286599008400 + 136946423212921 = 8734220^2 + 11702411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213233022221321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213233022221327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6038183120 + ... + 6038218433.

It is an arithmetic number, because the mean of its divisors is an integer number (53311274660133).

Almost surely, 2^{213233022221321} is an apocalyptic number.

It is an amenable number.

213233022221321 is a deficient number, since it is larger than the sum of its proper divisors (12076419211).

213233022221321 is a wasteful number, since it uses less digits than its factorization.

213233022221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12076419210.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 213233022221321 its reverse (123122220332312), we get a palindrome (336355242553633).

The spelling of 213233022221321 in words is "two hundred thirteen trillion, two hundred thirty-three billion, twenty-two million, two hundred twenty-one thousand, three hundred twenty-one".