211470299861 has 2 divisors, whose sum is σ = 211470299862. Its totient is φ = 211470299860.

The previous prime is 211470299837. The next prime is 211470299869. The reversal of 211470299861 is 168992074112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179886256900 + 31584042961 = 424130^2 + 177719^2 .

It is a cyclic number.

It is not a de Polignac number, because 211470299861 - 2⁶ = 211470299797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211470299869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105735149930 + 105735149931.

It is an arithmetic number, because the mean of its divisors is an integer number (105735149931).

Almost surely, 2^211470299861 is an apocalyptic number.

It is an amenable number.

211470299861 is a deficient number, since it is larger than the sum of its proper divisors (1).

211470299861 is an equidigital number, since it uses as much as digits as its factorization.

211470299861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 211470299861 in words is "two hundred eleven billion, four hundred seventy million, two hundred ninety-nine thousand, eight hundred sixty-one".