1212011100109 has 2 divisors, whose sum is σ = 1212011100110. Its totient is φ = 1212011100108.

The previous prime is 1212011100067. The next prime is 1212011100143. The reversal of 1212011100109 is 9010011102121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 738559766025 + 473451334084 = 859395^2 + 688078^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212011100109 - 2¹³ = 1212011091917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212011160109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606005550054 + 606005550055.

It is an arithmetic number, because the mean of its divisors is an integer number (606005550055).

Almost surely, 2^{1212011100109} is an apocalyptic number.

It is an amenable number.

1212011100109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212011100109 is an equidigital number, since it uses as much as digits as its factorization.

1212011100109 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 19.

The spelling of 1212011100109 in words is "one trillion, two hundred twelve billion, eleven million, one hundred thousand, one hundred nine".