101221231320 has 192 divisors, whose sum is σ = 367628919840. Its totient is φ = 23939942400.

The previous prime is 101221231301. The next prime is 101221231337. The reversal of 101221231320 is 23132122101.

101221231320 is a `hidden beast` number, since 101 + 2 + 212 + 31 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 101221231293 and 101221231302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149359 + ... + 474078.

Almost surely, 2^101221231320 is an apocalyptic number.

101221231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221231320 is an abundant number, since it is smaller than the sum of its proper divisors (266407688520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101221231320 is a wasteful number, since it uses less digits than its factorization.

101221231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623506 (or 623499 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 101221231320 its reverse (23132122101), we get a palindrome (124353353421).

The spelling of 101221231320 in words is "one hundred one billion, two hundred twenty-one million, two hundred thirty-one thousand, three hundred twenty".