102111120091 has 16 divisors (see below), whose sum is σ = 108798974784. Its totient is φ = 95630160384.

The previous prime is 102111120077. The next prime is 102111120107. The reversal of 102111120091 is 190021111201.

It is a cyclic number.

It is not a de Polignac number, because 102111120091 - 2²⁵ = 102077565659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102111120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8065 + ... + 451981.

It is an arithmetic number, because the mean of its divisors is an integer number (6799935924).

Almost surely, 2^102111120091 is an apocalyptic number.

102111120091 is a deficient number, since it is larger than the sum of its proper divisors (6687854693).

102111120091 is a wasteful number, since it uses less digits than its factorization.

102111120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444150.

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

Adding to 102111120091 its reverse (190021111201), we get a palindrome (292132231292).

The spelling of 102111120091 in words is "one hundred two billion, one hundred eleven million, one hundred twenty thousand, ninety-one".