1211102140109 has 2 divisors, whose sum is σ = 1211102140110. Its totient is φ = 1211102140108.

The previous prime is 1211102140097. The next prime is 1211102140139. The reversal of 1211102140109 is 9010412011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614886517609 + 596215622500 = 784147^2 + 772150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211102140109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211102140139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551070054 + 605551070055.

It is an arithmetic number, because the mean of its divisors is an integer number (605551070055).

Almost surely, 2^{1211102140109} is an apocalyptic number.

It is an amenable number.

1211102140109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102140109 is an equidigital number, since it uses as much as digits as its factorization.

1211102140109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 1211102140109 in words is "one trillion, two hundred eleven billion, one hundred two million, one hundred forty thousand, one hundred nine".