11211020001091 has 2 divisors, whose sum is σ = 11211020001092. Its totient is φ = 11211020001090.

The previous prime is 11211020001089. The next prime is 11211020001109. The reversal of 11211020001091 is 19010002011211.

11211020001091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (11211020001109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (19010002011211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211020001091 - 2¹ = 11211020001089 is a prime.

Together with 11211020001089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11211020001001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605510000545 + 5605510000546.

It is an arithmetic number, because the mean of its divisors is an integer number (5605510000546).

Almost surely, 2^{11211020001091} is an apocalyptic number.

11211020001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211020001091 is an equidigital number, since it uses as much as digits as its factorization.

11211020001091 is an evil number, because the sum of its binary digits is even.

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

The spelling of 11211020001091 in words is "eleven trillion, two hundred eleven billion, twenty million, one thousand, ninety-one".