211200013261 has 2 divisors, whose sum is σ = 211200013262. Its totient is φ = 211200013260.

The previous prime is 211200013237. The next prime is 211200013267. The reversal of 211200013261 is 162310002112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171411732361 + 39788280900 = 414019^2 + 199470^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200013261 - 2²³ = 211191624653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200013267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600006630 + 105600006631.

It is an arithmetic number, because the mean of its divisors is an integer number (105600006631).

Almost surely, 2^211200013261 is an apocalyptic number.

It is an amenable number.

211200013261 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200013261 is an equidigital number, since it uses as much as digits as its factorization.

211200013261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211200013261 its reverse (162310002112), we get a palindrome (373510015373).

The spelling of 211200013261 in words is "two hundred eleven billion, two hundred million, thirteen thousand, two hundred sixty-one".