210112211009 has 2 divisors, whose sum is σ = 210112211010.
Its totient is φ = 210112211008.
The previous prime is 210112210981. The next prime is 210112211017. The reversal of 210112211009 is 900112211012.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 204210898609 + 5901312400 = 451897^2 + 76820^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-210112211009 is a prime.
It is not a weakly prime, because it can be changed into another prime (210112211809) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105056105504 + 105056105505.
It is an arithmetic number, because the mean of its divisors is an integer number (105056105505).
Almost surely, 2210112211009 is an apocalyptic number.
It is an amenable number.
210112211009 is a deficient number, since it is larger than the sum of its proper divisors (1).
210112211009 is an equidigital number, since it uses as much as digits as its factorization.
210112211009 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 72, while the sum is 20.
The spelling of 210112211009 in words is "two hundred ten billion, one hundred twelve million, two hundred eleven thousand, nine".