2011201212091 has 2 divisors, whose sum is σ = 2011201212092. Its totient is φ = 2011201212090.

The previous prime is 2011201212061. The next prime is 2011201212143. The reversal of 2011201212091 is 1902121021102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011201212091 - 2³¹ = 2009053728443 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011201212061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005600606045 + 1005600606046.

It is an arithmetic number, because the mean of its divisors is an integer number (1005600606046).

Almost surely, 2^{2011201212091} is an apocalyptic number.

2011201212091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011201212091 is an equidigital number, since it uses as much as digits as its factorization.

2011201212091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 2011201212091 its reverse (1902121021102), we get a palindrome (3913322233193).

The spelling of 2011201212091 in words is "two trillion, eleven billion, two hundred one million, two hundred twelve thousand, ninety-one".