2102120999999 has 2 divisors, whose sum is σ = 2102121000000. Its totient is φ = 2102120999998.

The previous prime is 2102120999929. The next prime is 2102121000013. The reversal of 2102120999999 is 9999990212012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102120999999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102120999929) 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, 1051060499999 + 1051060500000.

It is an arithmetic number, because the mean of its divisors is an integer number (1051060500000).

Almost surely, 2^{2102120999999} is an apocalyptic number.

2102120999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102120999999 is an equidigital number, since it uses as much as digits as its factorization.

2102120999999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The spelling of 2102120999999 in words is "two trillion, one hundred two billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-nine".