213203111273 has 2 divisors, whose sum is σ = 213203111274. Its totient is φ = 213203111272.

The previous prime is 213203111221. The next prime is 213203111309. The reversal of 213203111273 is 372111302312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161477796649 + 51725314624 = 401843^2 + 227432^2 .

It is a cyclic number.

It is not a de Polignac number, because 213203111273 - 2¹² = 213203107177 is a prime.

It is not a weakly prime, because it can be changed into another prime (213203111873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106601555636 + 106601555637.

It is an arithmetic number, because the mean of its divisors is an integer number (106601555637).

Almost surely, 2^213203111273 is an apocalyptic number.

It is an amenable number.

213203111273 is a deficient number, since it is larger than the sum of its proper divisors (1).

213203111273 is an equidigital number, since it uses as much as digits as its factorization.

213203111273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 213203111273 its reverse (372111302312), we get a palindrome (585314413585).

The spelling of 213203111273 in words is "two hundred thirteen billion, two hundred three million, one hundred eleven thousand, two hundred seventy-three".