213113301221 has 4 divisors (see below), whose sum is σ = 213169343232. Its totient is φ = 213057259212.

The previous prime is 213113301217. The next prime is 213113301223. The reversal of 213113301221 is 122103311312.

It is a happy number.

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 213113301221 - 2² = 213113301217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213113301193 and 213113301202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113301223) 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, 28015301 + ... + 28022906.

It is an arithmetic number, because the mean of its divisors is an integer number (53292335808).

Almost surely, 2^213113301221 is an apocalyptic number.

It is an amenable number.

213113301221 is a deficient number, since it is larger than the sum of its proper divisors (56042011).

213113301221 is an equidigital number, since it uses as much as digits as its factorization.

213113301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56042010.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213113301221 its reverse (122103311312), we get a palindrome (335216612533).

The spelling of 213113301221 in words is "two hundred thirteen billion, one hundred thirteen million, three hundred one thousand, two hundred twenty-one".