213222110021 has 4 divisors (see below), whose sum is σ = 213310992000. Its totient is φ = 213133228044.

The previous prime is 213222110009. The next prime is 213222110027. The reversal of 213222110021 is 120011222312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213222110021 - 2³⁴ = 196042240837 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 (213222110027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44437391 + ... + 44442188.

It is an arithmetic number, because the mean of its divisors is an integer number (53327748000).

Almost surely, 2^213222110021 is an apocalyptic number.

It is an amenable number.

213222110021 is a deficient number, since it is larger than the sum of its proper divisors (88881979).

213222110021 is an equidigital number, since it uses as much as digits as its factorization.

213222110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88881978.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213222110021 its reverse (120011222312), we get a palindrome (333233332333).

The spelling of 213222110021 in words is "two hundred thirteen billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".