213220301303021 has 2 divisors, whose sum is σ = 213220301303022. Its totient is φ = 213220301303020.

The previous prime is 213220301303017. The next prime is 213220301303029. The reversal of 213220301303021 is 120303103022312.

213220301303021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175971128998921 + 37249172304100 = 13265411^2 + 6103210^2 .

It is a cyclic number.

It is not a de Polignac number, because 213220301303021 - 2² = 213220301303017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213220301303029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610150651510 + 106610150651511.

It is an arithmetic number, because the mean of its divisors is an integer number (106610150651511).

Almost surely, 2^{213220301303021} is an apocalyptic number.

It is an amenable number.

213220301303021 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220301303021 is an equidigital number, since it uses as much as digits as its factorization.

213220301303021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213220301303021 its reverse (120303103022312), we get a palindrome (333523404325333).

The spelling of 213220301303021 in words is "two hundred thirteen trillion, two hundred twenty billion, three hundred one million, three hundred three thousand, twenty-one".