102012120191 has 2 divisors, whose sum is σ = 102012120192. Its totient is φ = 102012120190.

The previous prime is 102012120149. The next prime is 102012120209. The reversal of 102012120191 is 191021210201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102012120191 - 2³⁰ = 100938378367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012120101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006060095 + 51006060096.

It is an arithmetic number, because the mean of its divisors is an integer number (51006060096).

Almost surely, 2^102012120191 is an apocalyptic number.

102012120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012120191 is an equidigital number, since it uses as much as digits as its factorization.

102012120191 is an odious number, because the sum of its binary digits is odd.

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

Adding to 102012120191 its reverse (191021210201), we get a palindrome (293033330392).

The spelling of 102012120191 in words is "one hundred two billion, twelve million, one hundred twenty thousand, one hundred ninety-one".