210112001009 has 2 divisors, whose sum is σ = 210112001010. Its totient is φ = 210112001008.

The previous prime is 210112000963. The next prime is 210112001059. The reversal of 210112001009 is 900100211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209233056400 + 878944609 = 457420^2 + 29647^2 .

It is a cyclic number.

It is not a de Polignac number, because 210112001009 - 2²⁰ = 210110952433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (210112001059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105056000504 + 105056000505.

It is an arithmetic number, because the mean of its divisors is an integer number (105056000505).

Almost surely, 2^210112001009 is an apocalyptic number.

It is an amenable number.

210112001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210112001009 is an equidigital number, since it uses as much as digits as its factorization.

210112001009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 210112001009 in words is "two hundred ten billion, one hundred twelve million, one thousand, nine".