213484611038221 has 2 divisors, whose sum is σ = 213484611038222. Its totient is φ = 213484611038220.

The previous prime is 213484611038213. The next prime is 213484611038291. The reversal of 213484611038221 is 122830116484312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109676816928900 + 103807794109321 = 10472670^2 + 10188611^2 .

It is a cyclic number.

It is not a de Polignac number, because 213484611038221 - 2³ = 213484611038213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213484611038291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106742305519110 + 106742305519111.

It is an arithmetic number, because the mean of its divisors is an integer number (106742305519111).

Almost surely, 2^{213484611038221} is an apocalyptic number.

It is an amenable number.

213484611038221 is a deficient number, since it is larger than the sum of its proper divisors (1).

213484611038221 is an equidigital number, since it uses as much as digits as its factorization.

213484611038221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 213484611038221 in words is "two hundred thirteen trillion, four hundred eighty-four billion, six hundred eleven million, thirty-eight thousand, two hundred twenty-one".