213504653046121 has 2 divisors, whose sum is σ = 213504653046122. Its totient is φ = 213504653046120.

The previous prime is 213504653046089. The next prime is 213504653046241. The reversal of 213504653046121 is 121640356405312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206006168997225 + 7498484048896 = 14352915^2 + 2738336^2 .

It is a cyclic number.

It is not a de Polignac number, because 213504653046121 - 2⁵ = 213504653046089 is a prime.

It is not a weakly prime, because it can be changed into another prime (213504653046821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106752326523060 + 106752326523061.

It is an arithmetic number, because the mean of its divisors is an integer number (106752326523061).

Almost surely, 2^{213504653046121} is an apocalyptic number.

It is an amenable number.

213504653046121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213504653046121 is an equidigital number, since it uses as much as digits as its factorization.

213504653046121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 213504653046121 in words is "two hundred thirteen trillion, five hundred four billion, six hundred fifty-three million, forty-six thousand, one hundred twenty-one".