2100120220489 has 2 divisors, whose sum is σ = 2100120220490. Its totient is φ = 2100120220488.

The previous prime is 2100120220487. The next prime is 2100120220493. The reversal of 2100120220489 is 9840220210012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1825019970489 + 275100250000 = 1350933^2 + 524500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100120220489 - 2¹ = 2100120220487 is a prime.

Together with 2100120220487, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2100120220489.

It is not a weakly prime, because it can be changed into another prime (2100120220487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050060110244 + 1050060110245.

It is an arithmetic number, because the mean of its divisors is an integer number (1050060110245).

Almost surely, 2^{2100120220489} is an apocalyptic number.

It is an amenable number.

2100120220489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100120220489 is an equidigital number, since it uses as much as digits as its factorization.

2100120220489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 2100120220489 in words is "two trillion, one hundred billion, one hundred twenty million, two hundred twenty thousand, four hundred eighty-nine".