211321130381 has 2 divisors, whose sum is σ = 211321130382. Its totient is φ = 211321130380.

The previous prime is 211321130357. The next prime is 211321130401. The reversal of 211321130381 is 183031123112.

211321130381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190939285156 + 20381845225 = 436966^2 + 142765^2 .

It is a cyclic number.

It is not a de Polignac number, because 211321130381 - 2¹⁸ = 211320868237 is a prime.

It is a super-2 number, since 2×211321130381² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211321130381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211321130281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660565190 + 105660565191.

It is an arithmetic number, because the mean of its divisors is an integer number (105660565191).

Almost surely, 2^211321130381 is an apocalyptic number.

It is an amenable number.

211321130381 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321130381 is an equidigital number, since it uses as much as digits as its factorization.

211321130381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 211321130381 its reverse (183031123112), we get a palindrome (394352253493).

The spelling of 211321130381 in words is "two hundred eleven billion, three hundred twenty-one million, one hundred thirty thousand, three hundred eighty-one".