2120012011109 has 2 divisors, whose sum is σ = 2120012011110. Its totient is φ = 2120012011108.

The previous prime is 2120012011097. The next prime is 2120012011129. The reversal of 2120012011109 is 9011102100212.

It is an a-pointer prime, because the next prime (2120012011129) can be obtained adding 2120012011109 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1453584688609 + 666427322500 = 1205647^2 + 816350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120012011109 - 2¹⁶ = 2120011945573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120012011129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060006005554 + 1060006005555.

It is an arithmetic number, because the mean of its divisors is an integer number (1060006005555).

Almost surely, 2^{2120012011109} is an apocalyptic number.

It is an amenable number.

2120012011109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120012011109 is an equidigital number, since it uses as much as digits as its factorization.

2120012011109 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2120012011109 in words is "two trillion, one hundred twenty billion, twelve million, eleven thousand, one hundred nine".