101221320303 has 16 divisors (see below), whose sum is σ = 150138434400. Its totient is φ = 67399464960.

The previous prime is 101221320293. The next prime is 101221320307. The reversal of 101221320303 is 303023122101.

101221320303 is a `hidden beast` number, since 10 + 12 + 21 + 320 + 303 = 666.

It is not a de Polignac number, because 101221320303 - 2¹³ = 101221312111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221320307) 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, 2238738 + ... + 2283503.

It is an arithmetic number, because the mean of its divisors is an integer number (9383652150).

Almost surely, 2^101221320303 is an apocalyptic number.

101221320303 is a deficient number, since it is larger than the sum of its proper divisors (48917114097).

101221320303 is an equidigital number, since it uses as much as digits as its factorization.

101221320303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523079 (or 4523073 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 101221320303 its reverse (303023122101), we get a palindrome (404244442404).

The spelling of 101221320303 in words is "one hundred one billion, two hundred twenty-one million, three hundred twenty thousand, three hundred three".