101302320221 has 4 divisors (see below), whose sum is σ = 107261280252. Its totient is φ = 95343360192.

The previous prime is 101302320199. The next prime is 101302320233. The reversal of 101302320221 is 122023203101.

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 52527597721 + 48774722500 = 229189^2 + 220850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101302320221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 5958960013 = 101302320221 / (1 + 0 + 1 + 3 + 0 + 2 + 3 + 2 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101302320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101302320271) 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, 2979479990 + ... + 2979480023.

It is an arithmetic number, because the mean of its divisors is an integer number (26815320063).

Almost surely, 2^101302320221 is an apocalyptic number.

It is an amenable number.

101302320221 is a deficient number, since it is larger than the sum of its proper divisors (5958960031).

101302320221 is an equidigital number, since it uses as much as digits as its factorization.

101302320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958960030.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 101302320221 its reverse (122023203101), we get a palindrome (223325523322).

The spelling of 101302320221 in words is "one hundred one billion, three hundred two million, three hundred twenty thousand, two hundred twenty-one".