213221203849 has 2 divisors, whose sum is σ = 213221203850. Its totient is φ = 213221203848.

The previous prime is 213221203841. The next prime is 213221203889. The reversal of 213221203849 is 948302122312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171893160000 + 41328043849 = 414600^2 + 203293^2 .

It is a cyclic number.

It is not a de Polignac number, because 213221203849 - 2³ = 213221203841 is a prime.

It is not a weakly prime, because it can be changed into another prime (213221203841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610601924 + 106610601925.

It is an arithmetic number, because the mean of its divisors is an integer number (106610601925).

Almost surely, 2^213221203849 is an apocalyptic number.

It is an amenable number.

213221203849 is a deficient number, since it is larger than the sum of its proper divisors (1).

213221203849 is an equidigital number, since it uses as much as digits as its factorization.

213221203849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 213221203849 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred three thousand, eight hundred forty-nine".