102020010220091 has 4 divisors (see below), whose sum is σ = 102020883863184. Its totient is φ = 102019136577000.

The previous prime is 102020010220069. The next prime is 102020010220099. The reversal of 102020010220091 is 190022010020201.

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 102020010220091 - 2³⁰ = 102018936478267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102020010220099) 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 in 3 ways as a sum of consecutive naturals, for example, 436646360 + ... + 436879941.

It is an arithmetic number, because the mean of its divisors is an integer number (25505220965796).

Almost surely, 2^{102020010220091} is an apocalyptic number.

102020010220091 is a deficient number, since it is larger than the sum of its proper divisors (873643093).

102020010220091 is an equidigital number, since it uses as much as digits as its factorization.

102020010220091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873643092.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 102020010220091 its reverse (190022010020201), we get a palindrome (292042020240292).

The spelling of 102020010220091 in words is "one hundred two trillion, twenty billion, ten million, two hundred twenty thousand, ninety-one".