211273129 has 2 divisors, whose sum is σ = 211273130. Its totient is φ = 211273128.

The previous prime is 211273109. The next prime is 211273133. The reversal of 211273129 is 921372112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209091600 + 2181529 = 14460^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 211273129 - 2¹⁵ = 211240361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211273097 and 211273106.

It is not a weakly prime, because it can be changed into another prime (211273109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105636564 + 105636565.

It is an arithmetic number, because the mean of its divisors is an integer number (105636565).

Almost surely, 2^211273129 is an apocalyptic number.

It is an amenable number.

211273129 is a deficient number, since it is larger than the sum of its proper divisors (1).

211273129 is an equidigital number, since it uses as much as digits as its factorization.

211273129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 211273129 is about 14535.2374937598. The cubic root of 211273129 is about 595.5909473795.

The spelling of 211273129 in words is "two hundred eleven million, two hundred seventy-three thousand, one hundred twenty-nine".