211954011329 has 2 divisors, whose sum is σ = 211954011330. Its totient is φ = 211954011328.

The previous prime is 211954011287. The next prime is 211954011337. The reversal of 211954011329 is 923110459112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137166529600 + 74787481729 = 370360^2 + 273473^2 .

It is a cyclic number.

It is not a de Polignac number, because 211954011329 - 2¹⁶ = 211953945793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211954011292 and 211954011301.

It is not a weakly prime, because it can be changed into another prime (211954011349) 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, 105977005664 + 105977005665.

It is an arithmetic number, because the mean of its divisors is an integer number (105977005665).

Almost surely, 2^211954011329 is an apocalyptic number.

It is an amenable number.

211954011329 is a deficient number, since it is larger than the sum of its proper divisors (1).

211954011329 is an equidigital number, since it uses as much as digits as its factorization.

211954011329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 211954011329 in words is "two hundred eleven billion, nine hundred fifty-four million, eleven thousand, three hundred twenty-nine".