211321431289 has 2 divisors, whose sum is σ = 211321431290. Its totient is φ = 211321431288.

The previous prime is 211321431287. The next prime is 211321431367. The reversal of 211321431289 is 982134123112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158935376889 + 52386054400 = 398667^2 + 228880^2 .

It is a cyclic number.

It is not a de Polignac number, because 211321431289 - 2¹ = 211321431287 is a prime.

Together with 211321431287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211321431287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660715644 + 105660715645.

It is an arithmetic number, because the mean of its divisors is an integer number (105660715645).

Almost surely, 2^211321431289 is an apocalyptic number.

It is an amenable number.

211321431289 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321431289 is an equidigital number, since it uses as much as digits as its factorization.

211321431289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The spelling of 211321431289 in words is "two hundred eleven billion, three hundred twenty-one million, four hundred thirty-one thousand, two hundred eighty-nine".