211012212010109 has 2 divisors, whose sum is σ = 211012212010110. Its totient is φ = 211012212010108.

The previous prime is 211012212010009. The next prime is 211012212010181. The reversal of 211012212010109 is 901010212210112.

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., 134883184222084 + 76129027788025 = 11613922^2 + 8725195^2 .

It is a cyclic number.

It is not a de Polignac number, because 211012212010109 - 2⁸ = 211012212009853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211012212010199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506106005054 + 105506106005055.

It is an arithmetic number, because the mean of its divisors is an integer number (105506106005055).

Almost surely, 2^{211012212010109} is an apocalyptic number.

It is an amenable number.

211012212010109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012212010109 is an equidigital number, since it uses as much as digits as its factorization.

211012212010109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 211012212010109 in words is "two hundred eleven trillion, twelve billion, two hundred twelve million, ten thousand, one hundred nine".