213301221031813 has 2 divisors, whose sum is σ = 213301221031814. Its totient is φ = 213301221031812.

The previous prime is 213301221031783. The next prime is 213301221031823. The reversal of 213301221031813 is 318130122103312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202039444827364 + 11261776204449 = 14214058^2 + 3355857^2 .

It is a cyclic number.

It is not a de Polignac number, because 213301221031813 - 2¹³ = 213301221023621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213301221031823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106650610515906 + 106650610515907.

It is an arithmetic number, because the mean of its divisors is an integer number (106650610515907).

Almost surely, 2^{213301221031813} is an apocalyptic number.

It is an amenable number.

213301221031813 is a deficient number, since it is larger than the sum of its proper divisors (1).

213301221031813 is an equidigital number, since it uses as much as digits as its factorization.

213301221031813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 213301221031813 in words is "two hundred thirteen trillion, three hundred one billion, two hundred twenty-one million, thirty-one thousand, eight hundred thirteen".