101920284817 has 4 divisors (see below), whose sum is σ = 109760306740. Its totient is φ = 94080262896.

The previous prime is 101920284779. The next prime is 101920284821. The reversal of 101920284817 is 718482029101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11124131841 + 90796152976 = 105471^2 + 301324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101920284817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101920284847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3920010942 + ... + 3920010967.

It is an arithmetic number, because the mean of its divisors is an integer number (27440076685).

Almost surely, 2^101920284817 is an apocalyptic number.

It is an amenable number.

101920284817 is a deficient number, since it is larger than the sum of its proper divisors (7840021923).

101920284817 is an equidigital number, since it uses as much as digits as its factorization.

101920284817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840021922.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 101920284817 in words is "one hundred one billion, nine hundred twenty million, two hundred eighty-four thousand, eight hundred seventeen".