1012021001191 has 2 divisors, whose sum is σ = 1012021001192. Its totient is φ = 1012021001190.

The previous prime is 1012021001183. The next prime is 1012021001279. The reversal of 1012021001191 is 1911001202101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012021001191 - 2³ = 1012021001183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012021001111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010500595 + 506010500596.

It is an arithmetic number, because the mean of its divisors is an integer number (506010500596).

Almost surely, 2^{1012021001191} is an apocalyptic number.

1012021001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012021001191 is an equidigital number, since it uses as much as digits as its factorization.

1012021001191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 1012021001191 its reverse (1911001202101), we get a palindrome (2923022203292).

The spelling of 1012021001191 in words is "one trillion, twelve billion, twenty-one million, one thousand, one hundred ninety-one".