2102021210189 has 2 divisors, whose sum is σ = 2102021210190. Its totient is φ = 2102021210188.

The previous prime is 2102021210147. The next prime is 2102021210207. The reversal of 2102021210189 is 9810121202012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1962358308964 + 139662901225 = 1400842^2 + 373715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102021210189 - 2¹² = 2102021206093 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 (2102021210129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051010605094 + 1051010605095.

It is an arithmetic number, because the mean of its divisors is an integer number (1051010605095).

Almost surely, 2^{2102021210189} is an apocalyptic number.

It is an amenable number.

2102021210189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102021210189 is an equidigital number, since it uses as much as digits as its factorization.

2102021210189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 2102021210189 in words is "two trillion, one hundred two billion, twenty-one million, two hundred ten thousand, one hundred eighty-nine".