211999006061 has 2 divisors, whose sum is σ = 211999006062. Its totient is φ = 211999006060.

The previous prime is 211999006057. The next prime is 211999006069. The reversal of 211999006061 is 160600999112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154641630025 + 57357376036 = 393245^2 + 239494^2 .

It is a cyclic number.

It is not a de Polignac number, because 211999006061 - 2² = 211999006057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211999006069) 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, 105999503030 + 105999503031.

It is an arithmetic number, because the mean of its divisors is an integer number (105999503031).

Almost surely, 2^211999006061 is an apocalyptic number.

It is an amenable number.

211999006061 is a deficient number, since it is larger than the sum of its proper divisors (1).

211999006061 is an equidigital number, since it uses as much as digits as its factorization.

211999006061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 211999006061 in words is "two hundred eleven billion, nine hundred ninety-nine million, six thousand, sixty-one".