110100123209 has 2 divisors, whose sum is σ = 110100123210. Its totient is φ = 110100123208.

The previous prime is 110100123169. The next prime is 110100123241. The reversal of 110100123209 is 902321001011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77063425609 + 33036697600 = 277603^2 + 181760^2 .

It is a cyclic number.

It is not a de Polignac number, because 110100123209 - 2¹⁶ = 110100057673 is a prime.

It is not a weakly prime, because it can be changed into another prime (110100123109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55050061604 + 55050061605.

It is an arithmetic number, because the mean of its divisors is an integer number (55050061605).

Almost surely, 2^110100123209 is an apocalyptic number.

It is an amenable number.

110100123209 is a deficient number, since it is larger than the sum of its proper divisors (1).

110100123209 is an equidigital number, since it uses as much as digits as its factorization.

110100123209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 110100123209 in words is "one hundred ten billion, one hundred million, one hundred twenty-three thousand, two hundred nine".