213102301221 has 8 divisors (see below), whose sum is σ = 315707112960. Its totient is φ = 142068200796.

The previous prime is 213102301201. The next prime is 213102301283. The reversal of 213102301221 is 122103201312.

213102301221 is a `hidden beast` number, since 2 + 1 + 310 + 230 + 122 + 1 = 666.

It is not a de Polignac number, because 213102301221 - 2¹⁰ = 213102300197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213102301194 and 213102301203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213102301201) 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 7 ways as a sum of consecutive naturals, for example, 3946338885 + ... + 3946338938.

It is an arithmetic number, because the mean of its divisors is an integer number (39463389120).

Almost surely, 2^213102301221 is an apocalyptic number.

It is an amenable number.

213102301221 is a deficient number, since it is larger than the sum of its proper divisors (102604811739).

213102301221 is an equidigital number, since it uses as much as digits as its factorization.

213102301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7892677832 (or 7892677826 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213102301221 its reverse (122103201312), we get a palindrome (335205502533).

Subtracting from 213102301221 its reverse (122103201312), we obtain a palindrome (90999099909).

The spelling of 213102301221 in words is "two hundred thirteen billion, one hundred two million, three hundred one thousand, two hundred twenty-one".