1212210001109 has 2 divisors, whose sum is σ = 1212210001110. Its totient is φ = 1212210001108.

The previous prime is 1212210001103. The next prime is 1212210001187. The reversal of 1212210001109 is 9011000122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871276630084 + 340933371025 = 933422^2 + 583895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212210001109 - 2²⁴ = 1212193223893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212210001103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105000554 + 606105000555.

It is an arithmetic number, because the mean of its divisors is an integer number (606105000555).

Almost surely, 2^{1212210001109} is an apocalyptic number.

It is an amenable number.

1212210001109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210001109 is an equidigital number, since it uses as much as digits as its factorization.

1212210001109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1212210001109 in words is "one trillion, two hundred twelve billion, two hundred ten million, one thousand, one hundred nine".