102011202091 has 4 divisors (see below), whose sum is σ = 104383555672. Its totient is φ = 99638848512.

The previous prime is 102011202089. The next prime is 102011202107. The reversal of 102011202091 is 190202110201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102011202091 - 2¹ = 102011202089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102011272091) 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 3 ways as a sum of consecutive naturals, for example, 1186176726 + ... + 1186176811.

It is an arithmetic number, because the mean of its divisors is an integer number (26095888918).

Almost surely, 2^102011202091 is an apocalyptic number.

102011202091 is a deficient number, since it is larger than the sum of its proper divisors (2372353581).

102011202091 is an equidigital number, since it uses as much as digits as its factorization.

102011202091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372353580.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 102011202091 its reverse (190202110201), we get a palindrome (292213312292).

The spelling of 102011202091 in words is "one hundred two billion, eleven million, two hundred two thousand, ninety-one".