2012153661109 has 2 divisors, whose sum is σ = 2012153661110. Its totient is φ = 2012153661108.

The previous prime is 2012153661107. The next prime is 2012153661131. The reversal of 2012153661109 is 9011663512102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031057468100 + 981096193009 = 1015410^2 + 990503^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012153661109 - 2¹ = 2012153661107 is a prime.

Together with 2012153661107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012153661107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006076830554 + 1006076830555.

It is an arithmetic number, because the mean of its divisors is an integer number (1006076830555).

Almost surely, 2^{2012153661109} is an apocalyptic number.

It is an amenable number.

2012153661109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012153661109 is an equidigital number, since it uses as much as digits as its factorization.

2012153661109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 2012153661109 in words is "two trillion, twelve billion, one hundred fifty-three million, six hundred sixty-one thousand, one hundred nine".