111101020101091 has 2 divisors, whose sum is σ = 111101020101092. Its totient is φ = 111101020101090.

The previous prime is 111101020101031. The next prime is 111101020101109. The reversal of 111101020101091 is 190101020101111.

Together with next prime (111101020101109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111101020101091 - 2³⁷ = 110963581147619 is a prime.

It is not a weakly prime, because it can be changed into another prime (111101020101031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550510050545 + 55550510050546.

It is an arithmetic number, because the mean of its divisors is an integer number (55550510050546).

Almost surely, 2^{111101020101091} is an apocalyptic number.

111101020101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101020101091 is an equidigital number, since it uses as much as digits as its factorization.

111101020101091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 19.

It can be divided in two parts, 111101020 and 101091, that added together give a palindrome (111202111).

The spelling of 111101020101091 in words is "one hundred eleven trillion, one hundred one billion, twenty million, one hundred one thousand, ninety-one".