1012102120591 has 2 divisors, whose sum is σ = 1012102120592. Its totient is φ = 1012102120590.

The previous prime is 1012102120543. The next prime is 1012102120649. The reversal of 1012102120591 is 1950212012101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012102120591 - 2²⁷ = 1011967902863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012102120541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506051060295 + 506051060296.

It is an arithmetic number, because the mean of its divisors is an integer number (506051060296).

Almost surely, 2^{1012102120591} is an apocalyptic number.

1012102120591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012102120591 is an equidigital number, since it uses as much as digits as its factorization.

1012102120591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 1012102120591 its reverse (1950212012101), we get a palindrome (2962314132692).

The spelling of 1012102120591 in words is "one trillion, twelve billion, one hundred two million, one hundred twenty thousand, five hundred ninety-one".