1210020020191 has 2 divisors, whose sum is σ = 1210020020192. Its totient is φ = 1210020020190.

The previous prime is 1210020020171. The next prime is 1210020020273. The reversal of 1210020020191 is 1910200200121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210020020191 - 2²⁹ = 1209483149279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210020020171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605010010095 + 605010010096.

It is an arithmetic number, because the mean of its divisors is an integer number (605010010096).

Almost surely, 2^{1210020020191} is an apocalyptic number.

1210020020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210020020191 is an equidigital number, since it uses as much as digits as its factorization.

1210020020191 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 19.

The spelling of 1210020020191 in words is "one trillion, two hundred ten billion, twenty million, twenty thousand, one hundred ninety-one".