211061751097 has 2 divisors, whose sum is σ = 211061751098. Its totient is φ = 211061751096.

The previous prime is 211061751083. The next prime is 211061751113. The reversal of 211061751097 is 790157160112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196381036201 + 14680714896 = 443149^2 + 121164^2 .

It is a cyclic number.

It is not a de Polignac number, because 211061751097 - 2¹⁹ = 211061226809 is a prime.

It is a super-2 number, since 2×211061751097² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211061754097) 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, 105530875548 + 105530875549.

It is an arithmetic number, because the mean of its divisors is an integer number (105530875549).

Almost surely, 2^211061751097 is an apocalyptic number.

It is an amenable number.

211061751097 is a deficient number, since it is larger than the sum of its proper divisors (1).

211061751097 is an equidigital number, since it uses as much as digits as its factorization.

211061751097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 40.

The spelling of 211061751097 in words is "two hundred eleven billion, sixty-one million, seven hundred fifty-one thousand, ninety-seven".